Sorry, but I don't think the wands will become a defacto, even if that's what Sony wants. In order for them to take off, they would need to bundle them with all systems, AND not include the DualShock3. Even if they include both, the thing that developers will see is that only 1 device, the DS3, is owned by almost (because of Sixaxis, but the main input is the same) 100% of system owners. Of course, dropping the DS3 from systems would be an incredibly bad move, as it would make no older games playable out of the box.
So, no, it's just not going to happen.
-dunno001
-On a quest for the truly perfect game; I don't think it exists...