We've seen 'em as sketches and we've seen 'em having fun on the snow, but now, after getting a few upgrades, they're parked on the stage at Frankfurt. BMW rolled out its new i3 and i8 electric cars, part of a new sub-brand focused on efficiency and responsive driving -- though it'll ultimately be up to the driver to determine just how responsively these behave on the road.
The i3 is
