3d is much harder than 2d. If there is one usecase where AI would be a boon, it is in 3d VTT's. Take a 2d map and create it in 3d using the 3d assets, that would sell, I think.
Any VTT needs to be able to run 2d, 2d is a lot more DM friendly and more versatile than 3d. If I want to show the...