Dynamic stuff is not up to the level of Voxatron, partly because it is just a lot more data to deal with, but you can have objects that move dynamically (as seen with windows and doors). That said, I may use old fashioned polygons for somethings like character animation, TBD.
I agree on the AI, I only want to discuss that I have plans to do some stuff with AI, and like I say on the site please be skeptical until you see anything. :)
Might want to look into a sparse system since storing 100% of the detail is great for demos like this but will result in huge amounts of wasted performance in most real applications, especially when working with mostly filled objects.
Overall a very impressive demo though.