You could also go the other way and use the improved range to shrink the battery, but with the ongoing battery cost drop that's not exactly a gamechanger either - and fast-charging long-range Chinese EVs are available for their domestic market for a fraction of the cost of entry-level Western models as well...
Don't get me wrong, improving aerodynamics is a nice goal, but with the ongoing push towards gigantic SUVs there's zero chance anything even remotely resembling this concept car will ever see the light of day.