And 2600, Gamegear, Megadrive, NEOGEO, MAME...
There is ALOT of emulation that can be done.
The controllers feel so much better than a keyboard.
I think you should do it for the emulation (do not steal games, that is not even cool).
And, I just found out, that a modded xbox can (or is) be region free, so you can import games as well.