I caught a screening last night and it was an amazing experience! The last time I had seen ROTJ on a big screen was in 1983 (for whatever reason I didn't see the Special Edition in theaters).
Even now I was seeing new things in the frame that I had not noticed before. And the image was perfect thanks to digital projection. I could see things in Jabba's Palace that I had never seen before. The same goes for things on the Death Star. One notable thing I spotted was in the celebration montage at the end of the movie. Like someone in orange. At Cloud City. Yeah. Somehow, ICMG returned!!!!