Let's forget about Arduino, Android SDK and glossy touch screen for a while ! I'm pretty sure this box will drive A LOT of things in the internet of things! The first thing I will hook-up will be my beloved Roland DYX-1300 pen plotter :)

The Pi is powered by a 700MHz ARM-compatible processor with hardware support for OpenGL ES 2.0 and Blu-ray-grade playback (1080p30 H.264), and features 256MB of RAM, TV, HDMI and audio outputs, a USB port, a Flash memory card slot, 100MBit Ethernet and a number of I/O pins for a serial port and general purpose hacking. This is all fitted on a low-cost 85.60mm x 53.98mm board that's about 20mm high, weighs 40g and is powered from a 5V supply.

Raspberry Pi