In my mind, there's little doubt we are going to get reissues of the trilogy as it played in theatres originally. Lucas has turned out to be a fan of doubledipping, and with the release of the deleted scenes, we're close to reaching a point where there's nothing to gain by re-releasing the Special Editions.
Yes, the sales figures for the Blu-rays were astronomical even though some of the changes were way more controversial than back in 2004, but the fact that so many people bought it will also mean that there are less people who'll be buying a re-release that doesn't actually bring anything new to the table. I'm sure the 2006 DVDs mainly sold that good because they contained the original versions. Sure, 3D may be a factor, but personally, I've only been underwhelmed by 3D films so far. And I can't be alone.
Sooner or later, George Lucas just has to swallow his pride and release these films. There is a demand for it, and that would mean money right down his pocket. The longer he holds it off, the more money he'll have. Till then, the restoration projects mentioned in this thread are more than satisfactory.