Possible, yes. One word: MESH.
Are there any demos of the mesh feature being used for anything practical (as in an actual game) outside of it just being there? I'll reserve judgement until I actually see someone make good use of it.
Being able to use the 3D box object to make other 3D geometry (and perhaps someday 3D models) would be something with far more potential in my opinion. But anyway.
I just wanted to say that this demo is amazing. This is what Construct is capable of, and I know I say this a lot, but I'd like to see its 3D capabilities (and usability of said capability) pushed even further someday.