Besides rendering your landscape, you can also output landscapes and motion data to other 3D animation programs. Currently WCS supports output to LightWave 3D and 3D Studio Max. While you are not going to get the same quality landscape image in another program, it is useful to be able to take a landscape and make it a 3D object for further manipulation. This allows for really exciting effects like having a LightWave rendered plane flying behind a WCS mountain. This opens the door for expanded capabilities, and it's great to see this supported in the program.
Special mention has to be made of the program's manuals.
There are two manuals that come with the program. There are a number of good tutorials that give the user a good tour of the program, as well as supplemental information about the program, like tricks to speed up rendering. There are also some appendices describing the basics of geography and a list of books to further your geographic education. The second manual is a reference manual, with in depth detail about every aspect of the program. At almost 500 pages, this manual really covers the package well.