The Cross Current will do 600-700 watts continuous on the top assist level <28mph. That means the battery cells will never see more than 4 amps continuous. My understanding is the latest/greatest 18650 cells can do 10-15 amps continuous but you sacrifice energy density if you want the ability to safely run higher peak currents (see here for more info). The fact is you simply won't ever see that type of current flow in a Cross Current.

How much do those other bikes cost with a 1kwh battery? The pricing hasn't been announced yet but my guess is the Cross Current will run $2500-2750 with a 1kwh battery. A Stromer ST2 is around $7k with the similar size battery.