Before any one goes crazy a domain whois update doesn't necessarily mean anything. It could have been a contact information update or updated to point to a different server. Also it could have been a renewal as the date is very close to the expiry date.
Perfect Dark is its own thing, to this day there still isn't anything quite like it. The only exclusive FPS Microsoft has is Halo. Titanfall 2 will almost certainly go multiplat, not to mention it's multiplayer only. SO and QB are also very unique TPShooters. I think there's plenty of space for a good Perfect Dark in X1's lifecycle, but I don't think MS/Spencer agrees.