The Sapphire FleX edition Radeon HD 6950 graphics card allows hook-ups of multiple monitors, using AMD's Eyefinity to spread games across multiple screens. It came out in the spring; here it is inside a cube.
Fancy 3D on your iPad? It's technically possible thanks to GRilli3D, a laminate overlay for iOS devices that works without 3D glasses. It needs CineXPlayer 3D, a separate iOS app, to on-the-fly convert 2D content to 3D. We haven't used it much, but don't expect Nintendo 3DS-quality effects.
Darbee Visual Presence from Snakebyte promises that it can turn 2D images into "3D experiences" without needing glasses, increasing depth cues in 2D images. Needless to say, we're skeptical as to whether this is more like snake oil.
In case you own too many consoles and all their motion-control hardware and lack any horizontal space, DreamGear's got you covered. DualMount and TriMount TV-top hardware double and triple-stacks your Wii sensor, Kinect, and PlayStation Eye into an absurd aerial array. Wait a second...we could actually use of one of these in our cramped apartment.
Attention, board game/miniature lovers: ePawn integrates real-world objects into video games, using a 23-inch touch screen. Best-use scenarios: high-tech chess boards, or bringing your hand-painted miniature collection into a full-scale RPG.