Tachikoma on 07 August 2014
not surprised by the lack of mentioning of playstation, if they were releasing it on playstation they would use the already existing networking stack used for portal 2 to allow playstation users to play through steamworks, the playstation version also wouldn't need the multi-OS specific support that Xbox One code would.
Of course, It could also be entirely possible that it's Windows 9 related and not directly related to xbox 360 / xbox one, since theres been rumors for some time now that they would be including xbox integration in window 9
