Steam is the largest digital gaming delivery service out there. Think of it as PC's version of Playstation store. You want to buy and play a game, you use Steam, and their sales are generally outstanding. Unlike the consoles, games quickly come down in price in the PC world. Recently, the developers of Steam, Valve, developed their own operating system that was designed with gaming as it's focus, unlike Windows, which is a general operating system. With that, they worked with several manufacturers to develop Steam boxes that look like console boxes, but are really just compact computers using Steam OS. But they're meant for the living room, instead of the office/study. They also just came out with Lync, which looks like Amazon FireTV, but is used to stream games from your PC to your living room tv. With that, they also released a controller that competes with the Xbox and PS controllers, but has functionality to streamline keyboard entries.
