Complete specualtion, but as I was reading over the last couple of pages, I have to wonder if there were some games MS have been holding back so that they have a nice suite of games to show off for Scorpio. The best way to show off Scorpio is to show off games that scream eye candy and action.
We know we will get Forza, and probably a Halo tease, at the very least, but I expect there are some big surprises coming. I suspected Crackdown was getting pushed back just to take advantage of Scorpio, so it would n't surprise me if other games that had not been announced also got pushed back.
I'm suspecting that Microsoft is trying to make Scorpio a new generation console without having to say it. While Crackdown, Forza, and everything else will be fully playable on the XB1, i won't be surprised if gamers see Scorpio as the destination system.
It really depends on price, obviously. If Scorpio is looking at $500, or more, then it will have a very minor impact. If they get it to $400 or less, then it is go time.