My prediction ... as long as DAZ 3D has software developers, there will be another version of DAZ Studio released at some date. DAZ Studio is still the best marketing tool out there to get people hooked on buying DAZ content. And a new Y.0 version is always more attention grabbing than a X.9.8.6 version will ever be.
How much innovation will there be?
Well, honestly, how much is really needed? Probably some work in the animation side of things. But the software is fairly feature rich in it’s current release already. Bug fixing certainly. Always room to keep up with advances in the 3Delight engine. But it shouldn’t take an army of developers to be working on DAZ Studio 5.0 for a year or two.