Source Media Arcade is an all-in-one media center experience for your PC. Shortcuts to your files, games, and movies appear as full-sized arcade cabinets, hand-held tablets, or mounted view screens. You access your media items simply by walking up to them and pressing the USE key. In version 2, you are able to play in MULTIPLAYER mode where your friends can come join in on the fun.
This video shows how the newly implemented engine features will allow for the interactive menus as well as on-screen streaming video playback.
Combined with the Remote weapon's built-in view screen, you can either use the cabinets to access the UI, or the Remote weapon.