Thx for the list. GTA sounds good, I think i will give it a try.
There is also a SimCity title available for Android, but sadly it was extremly unstable on my tablet, so i had to use the refund option in the google store. Hopefully those other titles will be of a better quality.
Emulators actually provide some of the best games I've played on my tablet so far, old adventures in ScummVM with touch controls are really awesome. Haven't tried the PS1 emulators, those could be quite good, too.
I don't think PS2 emulators will be viable in the forseeable future, since even my overclocked i5 750 desktop CPU isn't able to render Tekken or God of War at a playable framerate, no matter what settings or plugins I use. From what I've heard, even Sony is not capable of producing a decent software emulation of the PS2 in their PS3s.
Anyway, I think at the moment there are just not enough high quality games available to make using and Android phone as a console attractive. Your list, while helpful, is relatively short, and I suspect one could only target a niche market with the emulators. I guess in the end, it will all come down to the price. If it costs more than, say, 50 bucks, I don't think this will find a large audience. Or maybe that could bundle the app+controller with phones and cellphone plans...