Well after 1.0 I will explore 3D a bit more, and see if I can come up with something cool to play with - 3D sprite would be a good way to go.
I'd look for some form of mesh support. You're using Newton GD for physics (last I heard anyway) so perhaps you could update the wrapper to support 3D and mesh collisions as well - with support for even some basic mesh stuff, physics and lighting you'd have enough there to give Construct a real edge.