What he is talking about is DIVX (all caps), named to make people think of the OTHER DivX , which was an attempt at "DRM in a box" that went over about as well as a loud ripping fart in an elevator.
I predict other than the *philes (the same folks that bought Beta, Laserdisc, and anything else that claimed to be "better" than the rest) 4K is gonna flop as bad as 3D TV, the reasons why are numerous, 1.- DVD is "good enough" for the majority, which is why after all these years BD is still not a blip compared to the massive DVD install base, 2.- The bandwidth in the USA to stream 4K without getting capped? EXTREMELY rare, most folks would be lucky to be able to watch 2 vids before they get capped, 3.- The not insignificant investment from users that really like what 1080p looks like now, and 4.- The fact it won't work with anything they already have, thus causing the "I gotta buy the Beatles albums again" syndrome which in a "jobless recovery" isn't gonna fly.
Considering the majority of PCs still don't come with BD? I'm really not worried about 4K DRM, it'll be another WMA, only bitch is the wasted die space used by your GPU and/or board for this shit you'll never use. Damn, now I'm gonna have to grab that R9 270x before they have time to add that shit.