Every time I hear another rumor about this "digital release," I get more and more concerned that Disney might try bi-passing Star Wars on physical media altogether and only sell the OOT as a download and/or stream from now until eternity.
As that dude from Wired magazine said back in September of '06 during the GOUT debacle:
"They're not going to make the fans happy because the happy fan has everything he or she needs."
I would love to be wrong about that, but these rumors don't inspire much confidence.