On the DigitalBits rumor mill, it is said that SW will be released in 2011 on Blu-Ray. This is just the rumor mill page which is usually right about half of the time. It is also speculated that Indy and even Lawrence of Arabia will hit within the next couple of years.
It could be just the prequels, but at least its a step in the right direction. Lucasfilm will accept the format unlike how they never accepted DVD until it was near the end of its reign.