http://hexus.net/tech/news/peripherals/65949-amd-releases-dockport-promotional-video/
Display, data and power – in one connector
The emerging DockPort standard enables high-speed USB 3.0 data over existing DisplayPort connectors. A DockPort cable will also provide power transmission, enough to power and charge a laptop, for example. This combination provides a lot of functionality in one cable/ connector; "With just one inexpensive connector, users can now access power, a mouse, keyboard, external optical and hard disk drives, printers, gaming controller, and up to four external monitors. That’s a lot of capability from a single, standardized connector," explained Steve Belt, AMD’s corporate vice president of strategic alliances
The video shows AMD's Discovery Tablet reference design making use of the DockPort for many of its important functions. The port is used to power/charge the tablet and this same port on the tablet is used by the keyboard dock to connect to it and transform it into a 2-in-1 design. This emphasises the docking qualities of the port – as the docked tablet automatically reads the camera roll from a memory card inserted into the keyboard unit.