Crossplay between PS4 and Xbox One is not possible at the moment because Sony won’t allow it. This might change if Microsoft is able to convince them.
Gamereactor chatted with Xbox’s Head of Marketing, Aaron Greenberg, and Greenberg has confirmed that Microsoft is currently in talks with Sony about crossplay.
Greenberg said: “Absolutely, yeah. We’re talking to Sony [about crossplay], we do partner with them on Minecraft and of course we would like to enable them to be part of that; one community, to unite gamers. So we’re talking to them and we’re hopeful that they’ll be supportive of it.”
Crossplay between platforms will be cool because it means the population density will be higher. The more gamers means it will be faster to find a game to join!