I installed W8. Not even a fresh install and had minor problems, which was just the paying the W8 download. Since I live in Japan, I had to use a free VPN to do so. Other than that, Metro UI is simple, just took overnight to figure out the buttons and quirks. Type to search, right click to see other options as in "All the Apps", rearrange the tiles. EASY! Other minor problem was my PC Tools Internet Security Anti-Virus software is not supported, but until then, I will use the defender program.
I play a heavy modded Skyrim, GW2, and D3. It all works flawless like it was W7.
Only cool thing I recommend when the future of touchscreen is imporving, that a motion sensor bar above a touchscreen monitor desktop can be attached so you can wave a finger in the air and select those textiles.
Also I want to buy a decent touchscreen... at least a 32" LED 120hz display :)
the motion sensor whenever it's made...