Hm, even without shadows it looks very good, much better than most of other terrain demos.

And I agree with Fogman: Unity does no harm to other 3d applications. It is nice to check FBX files, to prototype some scenes to play around with it and finally it can even publish to a lot of platforms.

The multi-platform availability makes it more expensive of course. So if you really only want to play at weekends on a Windows PC then Unity is not the right choice for you. Then you better go with 3dgs or free options like Irrlicht, Ogre or Wintermute.