I wager that in due time, 3 row CUVs will have the same stigma attached to them that Minivans currently suffer. I also suspect that when that happens, a new market will emerge, but only after a slight resurgence in Minivan sales. Practically speaking, nearly all of the CUVs offer nothing but compromises in practicality next to a minivan. Appearance aside, there is not a single advantage to CUVs, with the exception of AWD being more available.
And in a twist of Irony, CUVs are more the soccer mom mobile than Minivans as it is. When I picture soccer mom's, I picture suburbanite, vain moms who are very image conscious - transporting their perfect soccer playing children to where ever - they'd be more likely to want to more positive image associated with CUVs. My anecdotal support to this is: I see far more soccer ball window stickers on CUVs these days than I do minivans. It's the rest of us more "average Joes" that lean toward minivans. My house isn't perfectly clean, my children aren't the cool kids in school. My wife doesn't wear make up every day (She is great the way she is). And I live out in the sticks. I want something that gets the job done, gimme a minivan.
Once the CUVs get uncool, I predict the practicality of the minivans will become tempting to many.
I'll confess though, right after getting married with our first kid on the way my wife initially wanted to look at a Pacifica. Feeling we didn't quite need a minivan. Started car shopping, it didn't last long - AT ALL. Our focus turned to minivans right away. That said, I'll say again, that if Chrysler could justify 2 minivans and a pacifica back then. It should be able to now.