If Microsoft did decide to pack in Xbox hardware I don't see them continuing first party study operations and making games for PlayStation. Microsoft's DNA is different to Sony, who have been in content creation - music, TV, movies - since 1987. Games were just another medium to move into. I couldn't see Microsoft putting up with delays with studios like Polyphony (Gran Turismo) or SCE Japan (The Last Guardian), nor could I see them entertaining a partnership with Hideo Kojima for the same reason. Sony seem happy to manage their internal teams like artists, not like engineers, and they seem to have no qualms about delaying things - look at Uncharted 4 - we're now on the third release date?