My complaints about movie theaters are that they display the movie too dark. Daytime scenes look like nighttime and night shots look like, well. I've heard they do that to save electricity on the arc used for the light. Less electricity less light in the film projector although I don't know how this applies to digital projectors.
There are many people who just can't see the difference and there are many people who just refuse to admit that the can see a difference. Out of the group of people who can see a difference, many of them are quickly loosing the ability to tell the difference at all.