Electric car. Free charging?

I just heard a podcast that stated that as we transform over into mass usage of electric cars over the next several years, which I believe we will do, that superstores like Walmart would likely offer free charging to get customers in the store. Makes sense to me. I think that will happen.

Rapid charging technologies are hoping to get charging times down to less than an hour and at a cost of a buck or two to recharge a car. Walmart I think would gladly pay a buck or two to have customers browsing their isles for an hour or so and more often than not making purchases.