It is my understanding that Disney gave this movie a FULL restoration treatment and transfered the original film elements to digital HD. I don't know WHY they haven't offered it for sale on Blu Ray, since they seem to be bringing out a lot of "classics" to home HD. Perhaps they are waiting for the Tron sequel to come out???
Nice...thanks for the heads up! Just got mine programmed. It's also playing the day after. I'm sure they'll release it on BluRay as it gets closer to the release, but since I don't have a bluray player, this is even better!