Although it seems similar to Intel's Compute Stick, this isn't an HDMI dongle, its a power transformer, or “wall wart”. Developed by Quanta and barely larger than a typical AC adapter, it contains two USB 3.0s, an HDMI output, even uses Cortana as a control mechanism. It can be plugged into any outlet, and is designed it to connect to a TV or computer monitor, then controlled via Cortana in conjunction with Bluetooth.
No, the Quanta Compute Plug isn't for your typical power-loving PC enthusiasts, but that's not what it's for. It's another option for streaming, browsing, and working just by plugging it in. It's tiny, and we are all loving tiny these days. Plus, if you're already a fan of Cortana (there's some of you out there, right?), you'll have fun utilizing her to control it.