Any update on this issue?

I have tried experimenting with several parameters, but in vain. Is there any workaround?

Noticed same issue, but seems to be limited just to Chrome. Tried same URL in IE11 and Firefox 36.0.4 and touch panned OK.  Interestingly, 2 weeks ago touch panning of Streetview wasn't working on Google Maps either, but it was working on the Mapview. Now it is working on both, but via the API call it used to work on the Mapview, now it doesn't work on either Streetview nor Mapview! 

So seems that someone is trying to fix it, have succeeded on Google Maps, now just need to fix it in the API version.

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Finally! I found someone with the same problem as me! This is consuming me... I can't bypass this problem. Very frustrating I can't use the Google Maps in some website on my tablet. 
It only happens on "multi" versions of Chrome! Updates are not getting to it, and we are now on '43.0.2357.125 m' and problem still remain!
On Google Maps it works fine! But not on API version...

A workaround is to spoof User Agent, switching to a mobile like version of the google map app. Any Android or iOS device will work.
You can spoof UA ether by DevTool > Emulation or --user-agent chrome flag.
I used "Mozilla/5.0 (Linux; Android 4.3; Nexus 10 Build/JSS15Q) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2307.2 Mobile Safari/537.36"

If you add spoof the User Agent to behave as if it is a mobile device, only touch interactions will work. All keyboard interactions will get ignored. In maps.google.com, both touch as well as mouse/key actions function properly.

@#6 
- "only touch interactions will work" : this may or may not be true...
using --use-agent="Chrome" activate the mobile like app and keyboard interactions, drag and pinch are working.
With "Mozilla/5.0 (Linux; Android 4.3; Nexus 7 Build/JSS15Q) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2307.2 Mobile Safari/537.36" drag, pinch and keyboard are also working.

My device is a Win7 SP1, Chrome 43.0.2357 and PQLab Multitouch Plateform IR frame input device.

- IMOO, maps.google.com is another map application, and true : it works right out of the box with Win7 touch devices, I don't know why.

My bad. I meant mouse interactions, not keyboard. Atleast that was the case when I tried it out some months back. If mouse interactions are not relevant for you, then this is a good solution. 
I had done some analysis sometime back and this is what I could figure out( might not be entirely true. Hoping that someone will correct me if I am wrong).

"Chromium( or chrome), sometime back, introduced touch gestures to zoom and to navigate history. Pinch and zoom gesture will change the browser zoom, and touch and drag across the page will go back or forward in history. Later they introduced flags to control these. 
When Windows touch devices came to market, http://maps.google.com was not supporting touch gestures when used within chrome, while this worked well when opened in IE. Later on, google fixed their maps implementation to support this in chrome. But even now, the Simple Map Example does not support touch gestures in chrome. If you have a look at the Map Events Demo, you can see that on Windows touch devices, only taps and double taps are firing the click events appropriately and drag events are not getting captured, whereas all mouse events get captured properly. If you change the userAgent, to mock Android or iPhone device, only touch events will get captured and mouse events are ignored. 
 
Some other people also  have stumbled upon this issue. Some people have tried to translate the touch events received to mouse events as mentioned here(stackoverflow.com/questions/17153478/chrome-issue-with-embedded-google-maps). I have tried using preventDefault to stop the browser from getting this event, but this will stop all the touch events as well and I was not able to find a way to send this event to map for handling this."

I have this same problem. It's driving me nuts. I have a lenovo AIO touch core I7 windows 8.1 I think someone nailed it above. It thinks it a tablet or something and does not allow the mouse keyboard to work right.

chrom on windows 8.1 acer iconia tab w510 same problem!

same issue here on windows 7 large screen touch device.

Windows 10 surface pro exhibits the problem in Edge, Chrome, and IE11

same issue with dell touch monitor running on windows 7!!

 Issue 9195  has been merged into this issue.

I am experiencing the same issue as described above.  Panasonic CF-31 running Windows 7 in Chromium.

Waiting on a fix for this for a project i've done. Do we have a timescale until a fix is rolled out? Embarrassing it's took as long as it has for such a company

Same issue on Windows 10 / Surface Pro 2.0 with Chrome.

Thanks to Stackoverflow, I found a workaround that doesn't solve touch AND mouse event handling..

see http://stackoverflow.com/questions/28661844/touch-events-not-working-with-google-maps-in-angular/31023464

Note; 
mouse interactions seem to be disabled when i use the script above (enabling touch)

eager to learn of a fix for this :)

As of today, I also seem to have this issue. I have Surface Pro 3, Windows 10. I cannot use the map on my site or the linked in the original post of this thread. I can scroll just fine with the keyboard, use touch events, or activate device mode to use the mouse... but the mouse does not work at all normally. I tried Edge and it works fine. I tried other computers (Windows 7, no touch desktop, and Windows 10, no touch laptop) and can use all maps with no problem.

I can't think of anything I changed today that would stop it from working. I checked in some code last night but everything worked. I woke up this morning and tried the site before syncing and it doesn't work. It doesn't work locally, on the test server, or on the live environment.

Re #20: You're now seeing the exact opposite of this bug (can only interact with touch). This bug is about the fact that you can only interact with mouse. See https://code.google.com/p/gmaps-api-issues/issues/detail?id=9521

Any update? First report is dated feb 2014 and yet after 2 years we have no solution...

It's been about two years since this was first reported. Has anyone been able to find a solution to the issue of Windows tablet/labtop combinations not being able to navigate Google Maps in both touch and keyboard/mouse configurations?

This bug persists when using the JavaScript API to generate maps, but the Google Maps website functions fine.

For those interested, there is a related case here:

https://code.google.com/p/gmaps-api-issues/issues/detail?id=4599

I've made a workaround available here: 

https://github.com/clshortfuse/googleMapsAPITouchWorkaround/blob/master/addTouchSupport.js