Ok so I've had the Samsung pn50c550 for about a week now. Today I decided to go into the SM to see if I could change the model to a C590 like you could in the B series. Well sure enough it was there and Cinema Smooth is working now on the C550. Funny thing is you can actually change it to the C6500, C7000, and C8000 too. So is 3D hardware based or software based? Hmmmmm.