So much about Henrik Fisker’s EMotion concept unveiled at CES this year is both exciting and, for now at least, almost completely untested. Those eye-catching butterfly doors, for example? Fisker still has to figure out how to produce them at scale. He still, also, needs to get a factory. And then there’s the battery, a version of which Fisker says will ultimately have a range of 500 miles or more, though we might not see that one for years.