Valve has activated in-home streaming for all Steam users, allowing users to play PC games on any machine on the same network.
This new system allows users to stream games from their high-end gaming machines to their lower-end PCs, laptops, Macs, and Linux-based machines. Currently the hosting computer must be a Windows PC, but Valve will expand the system in the future to support SteamOS, Mac, and Linux.
To begin simply log into Steam on your main Windows PC, and then log into the same Steam account on another system on the same network. Form here you can access your Steam library and play any game without installing it on the second machine. “When you play a game using In-Home Streaming, video and audio are sent through your home network from your high-end gaming PC to another device in your home. From here, your keyboard, mouse, and controller input is sent back to the remote computer,” Valve explains.