They can call it whatever. I see large rooms, that will contain 4 cars at a time, so 4 points of convergence. I suspect the walls will be almost all projected. Besides the starting tunnel, which may have something unique on the right of the vehicles, or that could be where the Goofy engine returns to the next group. The rest of the rooms seem just open rooms.
As I said, perhaps some moving walls aren't shown, but they are very limited in what they can do with multiple vehicles. They can hype all they want, and they will. They have you spouting out 2.5D just like they trained you.
They will convince you 2.5D is better than 3D that Ratatouille has. Even though 2.5D is nothing but a term created by a bunch of marketers in a room one day that may or may not have contained an Imagineer
We'll see. It will be a neat ride, but I think it will end up like Smugglers Run. A ride everyone thought was going to blow their minds, that reality has slowly crept in and beat down PR speak, and folks now have much more controlled expectations of it. Some even expecting it to be pretty non-mind blowing