I think it can't be coincidence that just a couple months ago this mention of 4k Star Wars goes up on RMW's website and now we're hearing this talk of a 4k blu-ray format by the end of next year. I think everyone in the industry is realizing "4k" is fast becoming the new buzz word. Regardless of when exactly this RMW job was commissioned, whether it was before or after the Disney deal, it must've been motivated by the realization of 1080p no longer being good enough for the foreseeable future.
The biggest question is whether it's the OOT, the SE or both that got the 4k treatment.