Intel's "Compute Stick" is a full PC in an HDMI dongle
 

Set-top boxes and streaming sticks are decent, cost-effective ways to turn the TV you already have into a "smart TV," but Intel has an intriguing new option for those of you who want something a little more versatile. The Intel Compute Stick is a full Bay Trail PC complete with a USB port, Wi-Fi and Bluetooth, and a micro SD expansion slot, and you'll be able to get them with both Windows 8.1 and Linux. Fascinating. I want one.

http://osnews.com/story/28195/Intel_... _HDMI_dongle