I might expect some cost reductions because the increased durability will lessen the amount of excess memories needed for remapping when cells go bad. And don't larger drives use NAND chips in parallel for speed? If you can simplify packaging by using a single chip you might cut costs there, too.
If its as supercalifragilisticexpialidocious as they say it is, you might also expect enterprise adoption to increase, lowering the cost of NAND by cutting demand or resulting in more reliable NAND.
It's also hard to know what kind of process improvements may take place over time.
Either way, I think cheap, durable and fast-or-faster-than-flash storage is pretty exciting, so I guess I'm willing to be optimistic. Storage is so expensive and so relatively slow that something that pushes the envelope on speed and cost just seems to have a lot of potential.