Well, I only hope this doesn't end up like the Lord of the Rings Blu-Ray. And I'm of course talking about image quality, not the fact that LOTR only came out in the theatrical version, which we'd love for STAR WARS and which is what LOTR fans complain about (understandably). But to get to the point, the LOTR Blu-Rays are sourced from the same master used for the several years old HDTV broadcast (from about the same time as the STAR WARS HD broadcasts) but they made a new encode for Blu-Ray which actually looks worse than the broadcasts due to an extensive DNR (Digital Noise Removal):

Blu-Ray:

HDTV:

Click on the pics to show full resolution (I recommend doing so to see the difference)

So we could end up with the 2004 transfers of STAR WARS looking even worse then the HDTV broadcasts we have now :-(