I am using Windows 8 on my work Surface Pro 3 and have zero issues with it. I actually use it more like a desktop replacement in the office with full dock, 2 external monitors, full keyboard/mouse, and wired ethernet. I use the touch screen and non-touch monitors together just fine.
I think that for someone that doesn't have a touch screen display, then the system is a bit cumbersome, but that is why there is a "desktop" option.