Microsoft will kick their teeth in, piss all over them, and throw them into a meat grinder if that wound up being the case. Uncharted doesn't move 10+ million copies like some of these supposed Microsoft exclusives will, and The Order is trying to exist as a 3rd person shooter with no multiplayer component in a world where online is basically assumed to be a thing in those kinds of games.
Microsoft is likely going to come out and give the E3 videogame equivalent of Garma Zabi's Funeral Speech (look it up). They have to go all-out, guns blazing because if they don't and sales of the X1 continue at the pace they currently are, there's a very real chance that Microsoft shareholders will kill the thing and take the L.
If Sony is complacent and this big Microsoft pushback happens, then we're in for one hell of a fight. Sony has a lead right now, but it's only a couple million and that could easily be diminished over the course of like 5-6 months if X1 sales start increasing at a rapid rate due to all of these announcements and the incoming price drop.
Videogames. Serious business.