This was Microsoft on x360 and PS3:
I checked with Microsoft to be sure Rodberg wasn't maybe just mis-hearing them. Maybe Microsoft wanted to break the barrier too? Here's a Microsoft spokesperson saying "no," while promoting how awesome the Xbox 360's online service is: "Xbox Live delivers the best entertainment experience unmatched by anyone else, with 35 million actively engaged members. We have a high level of expectation for our game developers to ensure that all Live experiences remain top notch. Because we can't guarantee this level of quality, or control the player experience on other consoles or gaming networks, we currently do not open our network to games that allow this cross-over capability."
http://kotaku.com/5813740/i-saw-the-playstation-3-wired-to-play-against-an-xbox-360-but-you-wont
But why should I care about that unless I am a fanboy?
You shouldn't. If you own a PS4 and want to play with people on other consoles, go for it, let Sony know you want it.
People who don't own a PS4 and want cross-play to have more people to play with on a different console - sort of like me, I prefer gaming on PC, but they tend to allow that where it makes sense - could ask for it but don't have much right to demand it from Sony really.
Sony should set up some kind of internal voting thing on PS4. They could also use it for other stuff like upcoming PS+ game options or whatever.
"Do you want cross-play or an extra PS+ title"
lol
IMO MS's next console, if it were to have Windows 10 game store support (and so PC backwards compatibility) as well as Xbox game support (by bringing it to PC), would probably leave Sony hurting imo. I say let them make the most of it so they can stay in competition next time. Though it might be in their interest to establish some sort of policy with MS now that goes forward.
I don't believe for a second that MS doesn't want to dominate living room entertainment.