I'm very picky about input devices, so the classic keyboard+computer form factor is kind of a turn off at this point. When I find a keyboard, mouse or joystick I like, I refuse to use anything else.
Besides keyboards can get dirty and worn out, and I'd rather not have to order special key modules and have to open up my computer just because the keyboard needs to be replaced.
The only type of AIO form factor that I like nowadays is the display+computer style, like the iMac for example. Display technology is now cheap enough and is changing fast enough that I want a new monitor as often as I want a new computer.
Years ago, I wouldn't dream of ditching my awesome CRT when upgrading my computer, but now that everything is cheap and light flat panel technology, I don't really care.
The LCD I have today is going to look like outdated trash next to the LED backlit, high contrast ratio, fast response time, quad HD display that I'll be able to get for half the price two years from now, and that display will be obsolete once AMOLED screens break the consumer price barrier.
Oh yeah, on topic, I don't think I'll be getting an X1000. It's just out of my price range and I don't have any reverance for the brand name any more. I'm a classic Amiga fan and a gamer, so I'll stick with my A500 and keep my eye on the minimigAGA and natami projects.