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Tl;dr: 11.5 km/kWh or 7.1miles/kWh.

For reference, compact EVs were getting 4 to 5 miles/kWh five+ years ago.

A Tesla model S gets about 3 miles/kWh, or a bit under half the efficiency of the EQXX.

Assuming there is still some room for improvement and other manufacturers can copy those results. Then, one could half the battery size (less resources) or to alleviate range anxiety (more acceptance for EVs). Both great prospects.

Oh, and this discounts improvements in battery technology which would increase those effects.

Why do they keep making stunning concept cars that turn into mediocre compromises once manufactured?