Second, for most films it adds nothing to the viewing experience and may actually detract from it. Just ask those viewers driven to remove their 3-D glasses midway when bad effects simply distract (ie, Clash of the Titans). Either way most films (non-action genres) won't benefit from the feature making extensive investment questionable.
Third, in my opinion it's still a novelty better suited to theme park rides. Call me when they can make a holographic movie that I can walk inside of.
In summary, 3-D is neither new, effective across genre, or realistic, so what's the big deal! It's hot now, but unless it advances drastically, it's no different from the red and blue 3-D technology of 60 years ago (esp. considering advancements in other industries that dwarf the baby steps of 3-D film). I can watch a movie on a phone that fits in my pocket and you want me to get excited about some cutout images that look a little closer than the background? Overrated!
Of course, 3-D animation is another story...
Of course, 3-D animation is another story...
