Kevin Smith, the developer behind the MAME emulator that allows you to run classic Nintendo and Sega games, as well as play arcade games on your fourth-generation Apple TV, is back with another cool software: an unofficial client that can stream Steam games from a Windows PC to Apple's new box.
The solution takes advantage of an iOS edition of Moonlight, an open source implementation of Nvidia's GameStream technology used by its Shield console.
Moonlight technology makes it possible to stream the full collection of Steam games from a PC to the new Apple TV without needing to run on the Apple TV hardware.