It doesn't look like I can haul a week's worth of groceries in it (which is one reason why i go downtown), or like I would want to use it to go to work, especially when it is windy and rainy. Looks like an expensive toy to me.
According to the website, there will be a separate cargo carrier with 300 lbs capacity. No word on cost, effect on speed, range, maneuverability, etc.