This has improved with age. I clearly remember seeing this in 1982, I enjoyed it back then, but despite me being a life long science fiction fan, in 1982 I just could not totally get my mind around the far fetched plot. I am a bit more comfortable with it today.
Today, I am simply amazed at the use of colour in the film. In fact, I would say that TRON is one of the very best looking movies of the 1980s.
One problem. During this period it was just expected that science fiction movies have a grand musical score (Star Wars, Empire. Jedi, Disney's Black Hole, Battlestar Galactica, etc) and when such a score was missing - as it is with TRON - the viewer left the cinema feeling like something was missing from the flick. We get that here.
But all things considered, TRON it well worth owning on DVD as you will wish to return to it with repeat viewings. As for sequel TRON Legacy (2010), it is well worth seeing, but don't expect the fireworks you got with this original.