I played an N64 emulator on the comp a few years ago. It wasnt that bad, problem was that it didnt exactly play the games perfectly. Many times there would be odd white patches that made no sense and some games wouldnt even play. The keyboard messed up playing games sometimes too, my friend is permanently stuck on the last level of Conker because he needs the analog stick to beat it. And the emulator was fickle, it wouldnt work on some comps despite them having the proper requirements and work smooth on other ones.
I dont know, Id like to have such a thing handheld but then again, you gotta ask yourself how often youd use something like that. Especially if they released an accompanying D-Pad with the analog stick, even at its most compact itd probably be too huge to carry around daily.
Something like the NES, Genesis, some GBA and even Arcade, those are cool because most of those games were short. SNES, N64, were getting into deep territory here when games were hours upon hours long. I was thinking about that recently. Would I really take the time to beat Chrono Trigger on my cellphone? Would I really have that kind of time with all the other apps I have, txting and even phone calls? Doubtful.
Dont get me wrong, I love the idea and am very grateful that these things even work on a cell phone. If such a thing as na N64 emulator comes out Ill be very happy and immediately get it. Same for the controller. I just realize as well that I probably wont use it very often.