I guess we'll know once the console versions come out! Not sure, but I don't think XBOX & PC cross-play would be a problem since they're both Windows, not sure about MAC, Linux & PS4, however. Would be amazing, but the respective parties/corporations must ensure that it doesn't come in more favor to the others than themselves, you know, money. Not actually sure why the latter would be a problem, but I've got an impression that it has been in earlier cross-platform debates.