Well, I think asking my friend to leave the game to drive back home so they can follow the fight scene on their computer before getting back would kill the mood of my playing sessions.
I agree that it looks nice, more than a 2d color battlemap inexpensively printed on vinyl, but I still think throwing dice in physical tabletop is easier than getting your phone, loading the dicerolling app, telling your friends the results because they likely won't see it... No, frankly, I don't want a 3D VTT. I don't have 3D tabletop (only flat terrain) and it was enough for my enjoyment. Switching to 3D, whether physical through building decors or, more easily, through a computer, might not help me to have more immersive sessions (if anything, I feel the focus on the computer would lessen the immersion). Also, it would need, more seriously than sending everyone home, to have the group focusing on a computer by the gaming table, which is not very practical compared to just pulling a map on the table and using glass beads and physical tokens to represent a scene when TotM becomes too difficult to ensure everyone is on the same page.
I might get interested in a 3D computer VTT if it is really to use (maybe by having a large library of set pieces, on par with battlemap one can find on the Internet, only with better quality to make interesting fights), and the total price of investment to have a "digital gaming table" like the one in the surface demo + virtual tabletop price drops around the same price tag as printing 2D maps (which is under 2 € a map if grouping your prints) over the long run. So I could be convinced, but the requirements are stringent.
Also, the fact that I don't want it for me doesn't mean that I want other to suffer by depriving them of it. If a company (WotC or another) offers a 3D tabletop, more power to them.