this is a little off topic, but hopefully useful to someone. i've found the google chromecast
http://www.google.com/intl/en/chrome/devices/chromecast/ to be an ideal plex client.
it consists of a dongle a little larger than a typical usb flash drive, a usb power cord (i plugged mine into a/c power, but i've heard a smart tv usb port for a hard drive would suffice), and a short extender that can be helpful if you have lots of hdmi devices.
one advantage is that it removes a box and a couple of wires from the entertainment area. i like it better than the ouya (
https://www.ouya.tv/) i was using before it for that reason, and because of the convenience of controlling the chromecast. it can be controlled from any android or ios device and any platform that supports chrome, whereas the ouya requires a game controller to watch. it also uses less power than even the ouya (although either as a client ought to save on the electric bill compared to any htpc). it works well with google music and pandora as well, which is nice if you have good speakers attached to the same tv as the chromecast.
for now, plex support for chromecast is limited to plexpass members, but only for an initial period. source:
http://elan.plexapp.com/2013/12/06/plex-on-the-chromecast-its-official/