Sony appears to be considering using Linux as the core OS for its upcoming PlayStation 3. Of course, Linux is already available for the PlayStation 2 as an add-on, but this would mean that Linux will run natively on the PS3, and most likely be the game environment as well.
Now, this is pure speculation, but if the PlayStation 3 is indeed based on Linux, and games are written for Linux on the PS3, it seems like it should be pretty easy to port it to Linux on the PC. Now how cool would that be!