Valve today announced that in-home streaming is now available as a feature on Steam for all users.
Those who have multiple computers at home can start using it now, as logging into Steam on two computers on the same network will connect, allowing you to install launch and play games as if on the main PC.
Essentially the feature lets users play PC games on a lower-end computer like a laptop or home theater PC, while the main PC does all the computing. You can even stream the game on a Mac or Linux computer.
So this will be great for those who have a pretty decent gaming rig at home, but want to get their game on on their laptops somewhere else in the house or a crappier computer.
Video and audio are sent through the home network, and controller inputs are sent back to the remote computer.