Not really something I’d get much out of, I think, a portable games machine. If it was, though, I’d be very interested in one that runs Linux. Especially since the emulator scene opens up all sorts of options for getting older games for free.
Actually, the Nintendo DS and DS Lite look kind of interesting. They seem to be doing reasonably innovative things with their games, rather than just throwing more pixels at the alien monster, and more polygons into Lara’s nipples.
I’ve not seen anyone else marketing anything remotely like Animal Crossing or Nintendogs (er? did I dream that one, or does it exist? Cool – it exists.).