I'm curious what your overall point is? The purpose of new innovations is to improve something. It's possible that in the very short term something like would

I'm curious what your overall point is? The purpose of new innovations is to improve something. It's possible that in the very short term something like wouldn't be the most cost effective thing, however it's not about the very short term, but rather about the potential. In most existing transportation systems, the potential of the system without large changes has probably mostly been realized. The potential of something like this may be much larger, which is why it would be worthwhile.