Also it would be cool if you could connect multiple monitors and keyboards and mice to the same computer and have multiple users using it at the same time. This might be possible under linux or under a virtual machine.
This could reduce the ammount of computers that have to be purchased for computer labs.
Think about it: a modern dual core cpu can probably run as much as 8 internet surfing sessions at one time without any problems.
That would be a good save on money and on electricity.