The awkwardly-acronymed CRISTAL, which stands for "Control of Remotely Interfaced Systems using Touch-based Actions in Living spaces," uses a camera to take an overhead shot of your living room setup, and you designate the compatible parts: TV, speakers, digital photo frame, HTPC, Roomba. Then you simply touch, swipe, drag and drop to control the room. Your digital media collection shows up as almost a Cover Flow-type design, and can be dragged either to the speakers or TV, or just examined more closely on the Surface-type screen itself. I love that you can watch a preview right there on the table, or quickly toss it to the TV to output it. The system, right now, would cost a prohibitive $10,000-15,000, but the team says costs could definitely be lowered.
Watch the video demo on this link: