Ebikes are what need this technology first. $2000/kwh battery is no problem if its under 3kg. even $3000/kwh is possible to consider. For cars, racing and super cars has to be first. Doubling range for 20x the battery cost is not, compared to 20%-40% the power to weight ratio for same range, on a car made to be superlight. Costs will follow scale, but mass production transport is not the first categories.