Probably a gadget freak more than anything else. :-)
Personally, I think the idea is most excellent in theory, but it really needs better battery tech before it will really be practical. I really like the idea of an engine tuned to run at a specific rate that is calculated to give it optimum efficiency to power a generator that is actually used for thrust is an excellent idea. Much of your fuel efficiency is lost in city driving with all the start and stop driving. I would imagine that the 3rd or 4th generation of these things will be pretty excellent cars, but given current battery technology (i.e., mostly lead/acid batteries, essentially the same as those in use almost a hundred years ago, it's not even practical from an environmental standpoint when you consider that they have to be replaced every 5 or so years.
I've been reading some good stuff about possibly using nanotech to make better batteries out of carbon fibers that may be promising someday, but until something like that is practical, it's nothing but the usual feel-good crap from the enviro-whackos.
Before that happens we will be using fuel cells.