Well, crystal balls might tell us the future, but for now....
The Pianoteq demo doesn't impress me as much as even Ivory, or in fairness, the good Roland's.
BTW, I'm curious, but, for right now, what modeled sounds can you say are currently the best available? Virtual analog... still not as good as the real thing (IMO). Virtual Hammond... B4 is great, but still not up to the standards of a XK-3c, which uses samples as well as modeling. Virtual Rhodes? Lounge Lizard is pretty good, but I've heard sampled Rhodes that spank it.
For a technology to be 'the future', surely SOMETHING now ought to live up to this hype, or it is just another 'also ran'.
Does anyone remember when FM was going to be 'the future'? Does anyone remember when additive was going to be 'the future'? Does anyone remember when wavetables were going to be 'the future'? Until ONE modeled sound comes out that is head and shoulders above any other form of synthesis, it is merely just another possibility, and by no means the de facto path we will all tread.
Just ONE... Anyone? Anyone...? Bueller....? Bueller......?