What are the odds the autogen or any of the photo based buildings will have harden rooftops so that you could land on them vs falling through?  I cant remember how FS9, FSX, P3D and Xplane handle them but I do remember every roof top could be a helipad because they were harden in one of them.  Some of the screenshots/videos we have seen around seattle you can see the helipad on two of the news stations that are next to the space needle, if buildings were harden we would already be a few steps ahead in helipads.  Side benefit....trying to land airplanes on rooftops was always a challenge.

Oh yes... seems like a good idea. Would be fun!