They still have the option to dramatically reduce the price. If they are willing to take some losses, they can just reduce the price of the X1 to 149 $ or even 99 $. The console would sell like hot cakes and most people won't care one second about the better hardware of the PS4K.
Anyway, I doubt they'll do that. I think MS is more likely waiting for the next gen an consider this one lost. So all they try to do is make as much money as possible, market share doesn't seem too important to them right now.
Official member of VGC's Nintendo family, approved by the one and only RolStoppable. I feel honored.