Ok /g/ we don't have an article in the wiki nor a pastebin, comparing the main features (format compatibility, internet video services available, Hi10 playback, power consumption)
Ideally, we should be able to list model-by-model functionality (Ex. PS3 Slim, Apple TV 2nd Gen, Roku Fifth Generation), so that we can empower our buying decision. Also, listing single-board computer and avaliable HTPC software for GNU+Linux, Windows and even MacOS
The closest thing we have for this is the wikipedia article, but it's clearly incomplete
https://en.wikipedia.org/wiki/Comparison_of_digital_media_players