In a similar style to the Raspberry Pi USB computer, the Cotton Candy is a USB based embedded PC running linux.  It has a HDMI output and so can be added to any monitor or HDTV with a HDMI input to immediately turn it into a 'Smart TV'

This device looks to be aimed more at the home user rather than developers or educators, it has impressive specs.  It runs on a 1.2Ghz ARM Cortex processor and features a Quad-Core GPU to handle 1080p video decoding.  1Gb Ram, WiFi and an SD slot make this a more than capable system.  The company behind it, FXI Tech, expect it to be available by the new year.