My Idea is to compact a commodore 64 into at least netbook size. You can use the C64 DTV plug n' play console instead of a real C64 because those are have an actual commodore on a chip and can be hacked to run with a keyboard and an input device. I also challenge you to not "cheat" like with the ZX spectrum where you used your phone to load games; I think you should compact the datasette or hack a walkman to actually run inside the console. Also try to include a cartridge port!