This is very similar to the MYT which went exactly nowhere (warning: bad music):
The inventor of that engine swore left, right, up, and down that it was tested as a highly efficient air compressor. Yet it does not seem to be used an as air compressor either.
I've also expected a turbine hybrid to be developed by now, but no such thing was ever made on that end either. I was told that the reason turbine designs are not used in cars is because of their lack of responsiveness, which for a hybrid would be a non-issue. Yet here we are with a bunch of hybrids but no turbine in any of them. I just refuse to believe there is nothing *revolutionary* coming for engines. I'm far from this field but every few years I'm looking at another new design that should have worked but didn't. I'm disappointed! The RX-8 was great to see in production, but not that "killer app" I was hoping for.