Comment: People will get pissed off and break your shit (Score 1) 284
Seriously!
Even if the outlets aren't more expensive than existing tech (which I seriously doubt), you'll still need advanced tech on the source end to turn power on/off to each outlet, so that's going to be an additional cost per outlet. Great. And you'll need to run each outlet in a star topology, which is going to get REALLY expensive what with the cost of copper shooting up so much.
Then you'll have the problem of people who have trouble charging their devices. If they're nice, they'll walk away. If they're mad, they'll kick the outlet or shove a pencil or something in there. If they're really made, they'll shove in a paperclip or other metal item to cause bridging or other fun electical side effects, either immediately or later when some other item is put into the outlet.
And how much are those damages going to cost? Well if you hire an electrician to come out and work on the thing, I assume you're going to have to pay at least $60 just to get him out there and start working on the circuit. Hopefully you won't have to shut power off to any of the other nearby outlets at the same time.
So how much energy is going to be "stolen" by that guy with the laptop or cellphone at the Starbucks, anyhow? Well let's see:
Wikipedia puts the average cost of electricty in America at $0.1102/kWh. A quick googling seemed to say that laptop chargers draw between 15-70W; I assume cellphone chargers are much lower than that. So even if we plugged in a power-guzzling larger laptop for 8 hours at the coffee shop, it would cost at most 70W * 8h * 1kW/1000W * $0.1102/kWh = $0.062
Six cents? It's going to cost less money than is sitting in the leave-a-take-a-penny tray?
Compare that to the price of hiring an electrician: Even with my totally-lowball estimate, if the electrician takes just 1 hour at $60/h to fix the outlet, and the outlets cost only $2 (for which you can't even get a GFI outlet), you could let people charge their laptops for free 8 hours a day for 1000 days and not spend as much money.
It's going to be hard to sell people on using them.