The only point Sony has is more big games may go cross play. Is that a bad thing, not from a consumer perspective, arguable from a business perspective but what are they worried about, consumers buy a console and that reason is what if cross play becomes a bigger thing, do Sony have a weak offering or does their catalogue of games mean users flock to them over Xbox.
Cross play only means users may look at Playstation with a more critical eye if multiplatform is all users care about, that's what Sony is worried about and Microsoft should be worried much the same but the lack of games and original Xbox One did much of the work already to knock them into second place. Competition, great for consumers. Sony are afraid people will choose Xbox because Playstation isn't strong on all fronts but really, they have the base, the games, put the work in and make Playstation better and don't worry, compete.
