New way to combat lag?
If others have already posted this I apologize. But here's an article detailing Microsofts attempts at reducing lag during remote gaming using cloud computing. I don't see why the same technology couldn't affect the Rift positively as well.
http://www.extremetech.com/gaming/188544-microsoft-research-invented-video-game-time-travel-to-fix-cloud-gaming
http://www.extremetech.com/gaming/188544-microsoft-research-invented-video-game-time-travel-to-fix-cloud-gaming
