Valid point regarding the const - the information IS important to C++ but can be dealt with at the C# model level (remove the need). I looked at the demo - fairly nice tool but addresses pure conversion only. A very real secondary need (almost at the same level as pure translation) is the ability to place the C++ code into a UML model - not just the class diagrams, but sequence etc diagrams too. Then I can "Fix" some issues of the basic model, perform package management, remodel the design, etc, and regenerate/test. I would suggest you look at CodeVizualizer (http://www.codedrawer.com/ - $50) which is a great tool for learning individual code segments but doesn't have the ability to generate all documentation I require/need for analysis, nor does it provide the big picture. I would highly recommend it for a utility tool for a C++ maintenance/enhancement project, but it falls short of being a "corporate" architect tool.
Nothing is impossible, we just don't know the way of it yet.