The 3D effects are subtle. They are not like the audience teasing effects of the 1950’s, where you were dogging arrows, snakes, hypodermic needles, or killer beast leaping out at you. Those were fun just watching the audience react. You don't have any of that now. You don't hear anyone talking about the cool 3D as they walk out of the theater, do you?
It's an excuse to get you to pay an extra 3 or 4 dollars more per ticket.
Watch out 3d video can cause problems depth perception.
http://www.audioholics.com/news/editorials/warning-3d-video-hazardous-to-your-health/
I believe 3D will be the default tech. in 3 years.