They are definitely adding arcade machines and more environments are in the works. I am actually commissioning a 6 player Xmen arcade 3d model that they are going to add. They have the Simpsons arcade in one of the videos.
I like the idea of having two avatars in the same room and being able to play a game via netplay. If they can pull that off it would be very cool. Has a Ready Player One Oasis vibe to it.