Airplay Mirroring for iOS devices like the iPhone 4S, and iPad 2 is pretty cool since now you can play iOS games on a TV, or monitor connected to the Apple TV Box.
I agree most iOS games don't deserve to be on the big screen, but re-makes of popular classic console games like Tetris, Pong, Final Fantasy 1-2 for iOS might be a good way of playing the classics without buying old consoles and cartridges for your TV.