It’s a great idea, but you can buy a quad core tablet for $50, plug a keyboard/mouse into it and have a much more powerful (with more memory) device. Price point is pretty high.
The interesting thing is that these kind of devices are the exact opposite of the current less portable giant screen which happens to have a computer in it like the iMac or Dell All-In-One systems.
You can also carry your computer around with you if you have a bootable USB stick with your OS of choice, and whatever user data you need. (assuming whatever you plug into allows booting from USB)
