"It's finally happening," Rocket League creative director Corey Davis tells me. He's talking about cross-platform parties and "finally" is an appropriate word. This is maybe the most oft-requested feature from players, but it's not as simple as flipping a switch. There's a reason that hardly any other games have been able to implement it.
I sat down with Davis earlier this month at PAX West to have a nearly hour-long conversation about the short- and long-term future of Rocket League. He detailed everything that's coming in the Fall Update, but one unseen addition will be the framework that allows for cross-platform parties. It's not imminent but Psyonix is getting started soon.
Sometime in October, Psyonix plans to roll out a Steam beta test for cross-platform parties. While it'll be confined to just PC, the goal here is to a) load test for eventually scaling up to handle 100 percent of Rocket League's users and to b) implement the game's own friends system.