You should give the X220T a try. Most people use them like a desktop/mobile combo. They keep a dock in the office which they can set it on to use it like a regular desktop. (Full keyboard, mouse, and screen.) You can switch to a laptop mode with a keyboard. (mobile with typing when the touchscreen just doesn't cut it) A tablet mode with the stylus (wacom) or a multitouch screen like an iPad. A great all-in-one solution, but pricey.

X220T is not really an entertainment system. You won't see a kid using a Lenovo ThinkPad. It's mainly used by professionals (lots of them in healthcare, particularly this model). IT guys love them because the ThinkPads are so easy to administer (Q67 Express Chipset, hardware KVM, anti-theft Intel AMT) and the engineering is solid.

I'm guessing with Windows 8, they'll be even easier to use in touch mode.