Google chrome OS
I think it will take over netbooks, and underpowered laptops/desktops. It will also be quite popular for a dual boot, if you just want to get on quickly.
And because its going to be on 86x CPU's and ARM, it has wide options. AND the Nvidia Tegra thing is only for ARM (at least i think i read that somewhere!).
That would be good. In fact I'll be getting a netbook when that comes available. Even though i hate them. 😀