People have been skiing pow on normally cambered and non-rockered skis up until just a few seasons ago.
The SFB, a ski both you (if I am not mistaken) and I skied all last winter, is an example. I would certainly not call it pointless. The Durets have 67 mm at the waist on the Bacons, so my guess is that they float just fine.
I would again point out that neither one of us has actually skied them, so calling them "pointless" (or the opposite, the "most amazing ski I've ever been on OMG") is impossible for both of us, as we know only physical attributes, but not how they ski.