The fact that it supports Arcview shape files. Its quality rendering and detail along with it's GIS capabilities. I think WCS is Number 1. Flexibility to do what we want. 3D temporal cloud motion.
Trees are superb.
Also OpenGL support on the Intel. Also like the extensive and outstanding documentation. Three times is a charm. It s professional and it creates very impressive pictures. Your manual, send it to Microsoft and tell them this is how a manual should be.