So on a previous SUR40 I was able to update it to the Windows 10 preview installing it over the Windows 7 OS. I was able to use the multi touch functions in the newer OS by copying the drivers from the C:\Windows\System32\Drivers folder in the old OS to the new one and it worked pretty well.

I tested installing Steam and ran it in big picture mode which really made good use of the touch interface. 

It worked well for strategy type games such as DOW, red alert etc however I had to use an overlay to translate the touch inputs to mouse inputs to control the game well.

This unit is currently at a friends place so he can work on some of his own projects.