I am not sure that TG2 could ever be regarded as a complete Terrain modeler without improvements to TG2's own ability to produce erosion easily. All terrain on earth that I have ever viewed shows some aspect of erosion, if not on a macro level, then on a micro. Therefore without erosion in a scene to some degree, it is not possible to say the terrain looks "real".
Having said that, Its not the most important thing to me in terms of my own efforts with TG2. But I do look forward to the time when TG2 is really a complete Terrain solution.
Good looking image Chris.