I'm guessing that everyone really wants to have both, I love depth, but the point of 3D is to be immersed and if things are floating around in front of you, you feel like you are there. If you watch something on a big enough screen depth is very immersive and it seems like the action is happening in the next room, but for most people watching on average TV screens popout is what is going to make them feel like they are there.
I loved the swords in Pirates! Those wow moments are what people are going to remember about watching something in 3D and most of those wow moments will be created by popout rather than depth. Depth gets taken for granted. Popout is so essential for the horror genre, where something is going to scare you a lot more, if for a second you think it's actually in the room with you. 3D and a good 7.1 system can create that illusion ...and that's what I want. I want movies to actually scare me, that's a very rare thing.
Bottom line, the average viewer of 3D is impressed by popout and feels disappointed if they don't experience a few cool popout effects when they pay extra money to watch something in 3D. If movie producers don't spend the time to create those effects, they're risking the general public not embracing 3D.