Mining resources are not correlated to scaleability.

Once again, whatever people's views on bitcoin at least realize that mining hashes don't dictate how many transactions can be processed by a miner. They mine a block, then they include as many transactions as they think they can get away with and keep the latency low enough to propagate. Right now they are capped by a block size limit which is the real next hurdle. Some people think there should be no block size limit - latency already becomes a limit in itself.

To hammer it home - someone using bitcoin does not need to use any more electricity than a computer and internet connection. The miners use the electricity and the amount of transactions they process is not directly linked in any way.