It's about time, too — YouTube has been working with 4K video as far back as 2010, with 4K live streaming rolling out last year. Heck, Facebook itself already supports 4K resolutions in its live 360 videos. The push to higher resolution video makes lots of sense considering Facebook's push into original content with more than two dozen original shows coming to the Watch tab. As more consumers pick up 4K televisions (and higher), they're going to expect to see similar on their computer screens.

Update: Facebook confirmed to Engadget that it is currently testing 4K video for both uploaders and watchers.