For some reason I'd expected theaters would be getting much higher resolution content than what is available to us in a home video format... Learn something every day. But they're definitely using better projectors than I have, that much is certain, haha.

Interesting bit of relevant info I stumbled across: "For Star Wars Episode III: Revenge of the Sith the more advanced Sony HDC-F950 was used, with higher resolution and better color reproduction than its predecessor. The film was cropped to a 2.35:1 aspect ratio from its native 16:9 frame. As a result only 817 of the 1080 vertical pixels were actually used."

So, they weren't even working with a full 1080 vertical lines on either digital prequel... If anything, the Star Wars Saga being released on 4K isn't likely to be much of a concern for us.