Another thing to consider, exactly the same thing happened when h.264 was first released.
Even though x264 quickly started seeing better results compared to DivX and XVid, you didn't see pirate encodes switch to x264 for years.
Even though x264 quickly started seeing better results compared to DivX and XVid, you didn't see pirate encodes switch to x264 for years.
So it was kind of a magical codec upgrade and now it seems more incremental to me.