Tata had indicated that the volumes at which Nano is expected to sell would require them to be inventive about their channel strategy. True to that promise, Nano can not only be bought from thousands of SBI outlets, but you can just as well place an order online. Of course, you wouldn't expect a courier dropping your car at your doorstep in a few days (at least not yet). So, you still have to visit your nearest dealer to pick up the car. As long as dealers are given a cut, they are happy serving as the last mile in the car purchase.
Clearly, this is no different from click-and-mortar. Only that, in this case, you could call it click-and-motor!