Most of my frustration if SW were to make another 70s prog rock album comes from the fact that he disbanded/left several projects to only focus on his solo stuff. If we had another PT album or another Blackfield album around the corner, another 70s prog rock album in between wouldn't be a problem, but since he is now only making his solo music, that makes it more boring. I'll still buy it and I hope it's good, but to be honest I'm more excited about him releasing another Bass Communion album.
I would prefer it if he did something new and took on a new direction, OR made another PT album, but it seems to be the thing with musicians his age that they find a safe zone and considering his newfound status of "godfather of prog", he has no reason to leave that to do something else. Unless he wants to.