Apple - Is AppleTV the only device that can receive AirPlay VIDEO?

Didn't intend to answer my own question, but I found this March 2011 Bloomberg article:

Apple Inc. (AAPL) is weighing an expansion of its AirPlay audio service to include streaming video from an iPhone or iPad to television sets, according to two people familiar with the project.

Under the plan, Apple would license its AirPlay software to consumer-electronics makers that could use it in devices for streaming movies, TV shows and other video content, said the people, who asked to remain anonymous because the plans haven’t been made public. Apple now only licenses AirPlay for streaming audio. Devices that could be used for video may be available this year, one of the people said.

So apparently the answer is "not yet, but maybe in the future."

XBMC can also act as an Airplay video receiver so that'll add practically any computer to the list, but as far as I know, they've reverse engineered the protocol, so there are no guarantees it'll continue to work.