There were PCI cards at one time where you could plug-in PC133 SDRAM, you could get one to go upto 4gigs of space, and use that as a virtual drive, same as if you used your extra ram (not like there is such a thing as extra ram). This was back in the day of win98 which can't handle more than 128mb effeciently(sp?). I don't know anyone who had a ram drive, or bought any such pci card, but a few of my friends looked into it. The company also claimed fast access times and all.
Anyways, I seem to be lost in my own ramblings . I'm sure just like flash cards were expensive at one time, this item, if adopted by the "niche" market, will eventually start to drop in price. There are alot of industries/businesses that would like an extremely fast, and extremely low failure rate drive. An example could be google, ofcourse if google were to buy these at their current price, it'd be out of business tomorrow. But if it was adopted by the select few that make said niche market, and that grew, price would come down.
We all are saying that it's ridiculous etc, but if you had the choice in say 10-20 years of a 999gb platter based drive for $200, vs. a 250gb solid state drive for $500 (I'm just throwing numbers out here), that "niche" market will grow considerably. I would personally choose a solid state one if it's advertised extremely low failure rate was true.
By the way, look at how common the Porsche is now. They built a cheaper version of their sports car, ppl started buying it, whether for name, or quality. At one time Porsche was a very exotic item.
Maybe I'm a dreamer, but I believe that it is the future. How far down the road I'm not sure, but it will become it.