I've been sampling the "premium" theater setups in SoCal, lately, and I have to say RPX has been the most impressive so far.
I have never been a huge fan of the blown up versions of feature films on floor to ceiling IMAX. Documentary type films like deep sea dives, sure, but not fast-moving action. Too much head movement and eye strain for me.
Anyway, I went to see G.I. Joe in a Pure Digital Dolby3D theater not knowing it was shot in 2D. I was not overwhelmed by the effect, though that may be due to the way the film was prepared. I thought the Dolby type setup with the multifiltered glasses and different digital processing would be an upgrade over the usual RealD, but it didn't seem to make a difference. I saw a lot of ghosting in anything faster than a character walking. Eyestrain was minimal. There was no sound upgrade. In fact, the audio seemed out of sync at parts (in presentation, not editing). Overall, the added cost ($20 regular price) didn't add much to the experience. Maybe I'll come back to it and watch an actual 3D film so I can better compare it. It may be awhile, because I have experienced RPX and I can't imagine a better way to watch a movie.
Granted, having an equivalent at home would be even better, but the showing I went to was empty, so no theater fouls or distractions. First, the intro for the sound system was great. It reached a higher dB rating than would be comfortable for an entire film, but that was just the intro. The remainder was a perfect balance with more discreet channels, a little louder than usual, bass that's a punch to the chest, yet still clear and detailed - unlike some IMAX where I've heard muffled bass and distortion. The flat picture quality was amazing! Incredibly fine detail and accurate color (to my eyes) made close-up shots look vividly realistic. I expected the quality to drop off as soon as 3D really kicked in, but no amount of field focus or movement took anything away from the very lifelike representation. There was no eyestrain, ghosting or even fuzzy edges between foreground and back. The image was also as bright with the glasses on as a 2D movie. To top it all off, I got to prop myself up in a comfortable, clean new theater seat with a high headrest and rocking pivot to get in a good viewing angle.
RPX is my favorite so far. That may change if Regal drops the ball on quality control and standards, but if they keep it up, I may end up going to RPX screenings whenever possible.
It's 4:30am, so this is probably rambling, but I thought I'd throw it out there anyway.