Meet the ZOTAC ZBOX CI521: a compact, passively cooled mini PC for media consumption and other basic tasks. It has a built-in SD card reader, HDMI/DisplayPort outputs, fast 802.11ac antenna, and 4 USB 3.0 ports. It has an Intel Core M processor inside and 8 GB of RAM.
This compact computer is quiet and lightweight. In fact, you can mount it to the back of your monitor. More information is available here.