O Developer Manomio revealed plans to release the Atari 2600 and Amiga 500 emulators for the iPhone from Apple. He has already released a free C64 emulator and a few C64 games in the App Store from the past.
The first video shows the Atari 2600 emulator to perform Space Invaders, Berzerk, and Frogger. The second is the Amiga 500 emulator and shows International Karate Plus and Turrican 2 be played on an iPhone.
Download C64 emulator