SSDs are in part a classic disruptive technology, a repackaging of something new and at least originally not quite ready for prime time that's eating away at various disk drive niches, some lower end.

On the other hand they're at least a bit of a sustaining technology, just another mass storage technology (well, at least until people start using them as other than drop in replacements for disk drives and use them with their advantages and limitations). Funding them as a class of technology is not a hard decision for VCs, they're not as much a new thing as FPGAs, and there's e.g. Intel validating the concept.