Lucas is a shrewd businessman. He must know there is a market for the original films. His decision could only mean one of two things:
1) He truly believes his reworked vision is the best and does not care how anyone else feels about it. The originals will never be released. To hell with the fans.
2) He is setting us up by telling us this version on Sept 21 is the only one ever to be released, but plans to suck us in to buying a second DVD set by "suddenly" changing his mind and releasing the originals, thus milking the fans twice.
Either way, he deserves a nose bleed. We made him rich, we deserve some consideration. My idea will do that.