Lucas himself called Spielberg the better filmmaker - or perhaps he said the better director - in his biography (Spielberg is a prodigy, not unlike Mozart was as a composer.) Lucas believes his talents lie in somewhat different areas, with his skills in animation & design, film editing & plotting. I sometimes think he could be described not as a great writer or a great director, but as a great storyteller.
Putting Indy aside - if all Lucas has done in the past 35 years was work on the Star Wars universe, he'd still be the most influential person in pop culture and film all this time. Only J.K. Rowling could know how he feels. if she writes nothing else, she'll still be busy as the caretaker of the Harry Potter universe.
I actually haven't gotten the Blu-rays yet; but then I wasn't in a rush when the DVDs came out either, having dropped so much money on the Special Edition laserdiscs in 1997. I'm still busy buying my favourties from this past summer (Thor, Captain America, Super 8) plus getting seasons 1-3 of The Clone Wars. But in time I will.
"I'm not smart so much as I am not dumb." - Harlan Ellison
Lucas was great at the grander scope of film making. He sure had vision for Sw in the 70s, he helped Coppola on some projects in the 80s and certainly opened a new avenue of film making for Spielberg with the Indy movies (work fast on reduced budgets).
However, nowadays.. ever since the PT it feels to me he is running around in circles doing more of the same. I sure like to see one of those small independent art house movies he was always boasting about doing after SW.