Yes their is promise, but these materials are a stinker to work with. Then again, we are talking a technology that is a cousin to a turbocharger, but no one has produced an engine in the numbers we are talking about here. There is a problem about govt money used for R & D for mil-spec items and them making it for a civilian application, uncle sugar doesn't like that.
I was looking for the name of this company and for the life of me couldn’t remember it, took a while to google it:
http://query.nytimes.com/gst/fullpage.html?res=9A06E0DA163DF931A35751C1A961958260
Take a look at this little baby, with its size and weight we could easily mass produce it if we wanted to, even with the tolerances in the microns.