Its a glorified movie theater
The seats are bigger & recline. Quite nice & the theatres have $7 movies all day Sunday
In addition to the larger screen and better sound, the seats are leather and you can reserve your seats at time of purchase. This eliminates the need to arrive early to get the seats you want.
I'm not familiar with XD, RPX is like the middle of a regular screen and Imax. It's larger that regular, higher definition sound and more spaced out seating.
Thanks! Your answer is awaiting moderation.