I'd be interested to see what direction Lucas goes with the BluRay release of the SW movies in the next few years.
The reason I say this is if you watch the Jon Stewart interview with Lucas last month, Lucas made a point of saying there are 2 SW fanbases, the OT fans and the PT fans, so he is aware that many fans prefer one trilogy over the other.
I always though the way Lucas talked during the Episode III release is that it was one story, no trilogies, just 6 movies only. But to see them re-release the OT on DVD last year in new boxart, yet they STILL sold them as 2 trilogies! They could have easily re-packaged the movies in one Saga Boxset, but chose to sell them still as two trilogies.