Sony has sold off Sony Online Entertainment as well as a number of IPs that were originally PC & PS4 exclusives. These games are now going to find their way to the Xbox One.
Sony sells its Everquest-making arm; games will expand to Xbox and mobile: Arstechnica
Analyst says Sony investing less in game development: GamesIndustry
Sony Online Entertainment Answers Questions After Acquisition: Xbox, IP Ownership, PC Priority and More: DualShockers