[0] http://render.otoy.com/gallery.html
[1] http://www.chaosgroup.com/en/2/galleries.html?catID=8&pr...
[2] http://www.gametrailers.com/videos/rsaomx/cryengine-2-cryeng...
That's probably more of a feature than a bug since they have different purposes and different. That said, there are a variety of acoustics simulation (including auralization) software designed to be used with CAD packages, included EASE/EASERA, CATT Acousics, Bose Modeler, BASTIAN, SONarchitect and so on.
These packages aren't at a point where they can be used by non-acoustics experts which is probably why they aren't integrated directly into CAD software (although I remember reading once about an auralization package for AutoCAD, but I can't find it right now) due to limitations in the algorithms that might be ignored by folks that don't know acoustics.
You could add "speaker" objects that produce sound, just like "lamp" objects currently produce light, and allow a "microphone" object to receive the sound waves. Microphones could be tested in multiple places of the model space.
Useful environment spaces and materials could be provided, such as cathedral, studio room, creeks and outdoors, etc.
A smell simulator would be nice too.
http://www.ted.com/talks/julian_treasure_why_architects_need...