I do agree, we have nothing to discuss if there will be no demo version at least of what he is talking about. Because if only idea, then the chance that it will not ever materialize is always there. So until he can offer a much well founded concept along with the actual app, then that's the time that we can discuss about this idea of him.
You are right, the idea is interesting, but we need a test version of the platform or at least a development plan for this platform. Without this, it is difficult to assess its potential and understand whether there is a chance to realize it. I also saw many interesting ideas, but not many of them were able to implement.