Win 8 will do fine. I'm betting that it will do better than 7. Once compelling hardware with more touchscreen enabled device is available to be purchased it will be widely accepted and I think universally liked.
The Metro start screen has grown on me. If you are using it on a touchscreen device for web browsing, email, social networking and such it works great and is pretty intuitive.
One question though. Is there a way to change the background in Metro?
You can customize it with various color schemes and choose from quite a few background designs but that's it.