So I probably should have put this in my original comment as I've gotten a few replies in the same vein. What I mean by MPEG-2 being obsolete is that whilst DVDs are still created and purchased all over the world, and DVDs do make use of MPEG-2, we have superior video compression formats available that are mostly, patent encumbered, but also technically superior to MPEG-2 in just about every way other than availability, and now, the lack of patent encumbrance (outside the Philippines and Malaysia at least).

Or put another way, it isn't yet commercially obsolete, but it is technically obsolete.