It looks like Xbox One vs PS4 multiplayer might actually become a reality, as Microsoft opens the door to cross-network gameplay.
Microsoft has already announced plans to support Xbox-One-to-Windows-10 multiplayer, but has now taken it one step further by adding rival consoles into the mix.
There's no guarantee that Sony will take Microsoft up on the offer, of course, but the technology is there should they choose to accept.
Microsoft's Chris Charla made the announcement on the Xbox blog, confirming that cross-network multiplayer would begin with Rocket League on Xbox One and PC.
"First, in addition to natively supporting cross-platform play between Xbox One and Windows 10 games that use Xbox Live, we're enabling developers to support cross-network play as well," he said.
"This means players on Xbox One and Windows 10 using Xbox Live will be able to play with players on different online multiplayer networks - including other console and PC networks.
"Of course, it's up to game developers to support this feature, and Xbox Live players will always have the option of choosing to play only with other Xbox Live players.
"We're thrilled to confirm that Psyonix's Rocket League will be one of the first games to take advantage of this new capability by enabling cross-network play between Xbox One and PC players, with an open invitation for other networks to participate as well."
Other games to support Xbox-One-to-Windows-10 multiplayer will include Quantum Break, which makes its debut on April 5.