For movies, not much. There's definitely a wow factor in some of them but you quickly forget about it and just enjoy the movie.
After getting used to higher resolution on my desktop and in games I occasionally get distracted by the resolution of 1080p TV and movies. I get used to it for a while then there will be a scene switch or something and I'll get bothered by it. Not as often as the jitter from low frame rate panning though.
If money can't buy happiness, I guess you'll just have to rent it.