Valve announces their plans for this week's Game Developers Conference in San Francisco, CA, indicating they have ambitions for their Steam content delivery service to make its mark in the coveted living room space. They reveal an upcoming "big picture" mode, "which will offer controller support and navigation designed for television interaction," saying this: "will enable gamers to enjoy Steam and their library of Steam games on more screens throughout the house." Details will be revealed to attendees at the GDC, and in the meantime, here's what Valve marketing VP Doug Lombardi says about this: "With big picture mode, gaming opportunities for Steam partners and customers become possible via PCs and Macs on any TV or computer display in the house."