In this hypothetical he'd still have made like a gazillion dollars on Star Wars right?

With that kind of money comes power and he'd still be terribly dissatisfied with the half finished film he made. And if the same film is still incredibly popular with the public they'd still be numerous re-releases and an opportunity for George to update it to satisfy its shortcomings. So things wouldn't be all that different.

Although with only one film to concentrate on you'd think Fox would give it the Blade Runner/ Close Encounters/ Alien treatment when it comes to a dvd/ blu-ray release.