I never really let myself believe it would be out this year, so I'm not too upset about this.
I would welcome a remaster collection, though.
As far as whether this is going to hurt Sony over the holidays... well, they didn't launch with any good exclusives, and they were fine. Second Son did fine but wasn't a killer app, and they were fine. Don't know how The Order did yet, but they recently announced 20million+ sales worldwide, so they're probably fine.
I think the PS4 is in a place now where any single game isn't of critical importance. They have breadth on their side. More indies, usually better multiplats, and about the same number of exclusives as MS. Halo will be a big deal, of course, and it might bump X1 sales above PS4 temporarily, but I don't think it will change the prevailing dynamic in the long-term.