Re: sure large scale flash is just around the corner
For HDD, you save a bunch of money if you accept slower I/O, because a slower motor is cheaper and allows cheaper I/O electronics, and a slower actuator is cheaper. Furthermore, increased parallelism is very expensive. Access electronics are very expensive because of the complicated analog circuitry needed for the magnetic signals.
By contrast, you save almost no money if you accept slower I/O for flash. Access electronics are cheap and therefore any amount of parallelism is cheap. Throughput is limited only by the speed of interface. Read latency does have a lower bound but is thousands of times better than HDD even for very slow flash. Flash cost is driven (to a first approximation) by the number of flash bits. Large-scale flash storage cost will closely track the cost of flash chips.