Having watched Tron the original movie back in the 80s, watching Tron : Legacy is a good experience of realisation of how time has passed by. Although there's nothing much to shout about but it is more of a retrospect in life of then and now. I remember watching it in the cinema hall where the seats are hard and there's no head rest.
The 3D effect was very minimal and thank God I had season passes. Or else it would have been a total rip-off.