Over the weekend, Lucasfilm minion Steve Sansweet confirmed that STAR WARS Blu-Rays are in the works, and have been for a while.
"I won't call it the Ultimate Set because we keep finding stuff—but, a very full set of all six movies on Blu-ray with lots of extra material. We're finding all kinds of scenes from dailies that have never been seen before.
[EDIT]
it won't be in the too distant future." [Source: AICN.com]