Sounds like much of it is still in the research phase, which means take all claims with a grain of salt. Comparing it to the Prius is a bit silly, since the Prius is demonstrated technology. It could easily wind up being 50% more expensive than a Prius, and have higher operating costs as well.
This technology will have to be proven before other manufacturers jump on the bandwagon. Even with battery hybrids, which were proven over 80 years ago, it took a successful run with the Insight and the Prius for many years before other manufacturers jumped in.
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