I see the use case for these in databases and almost solely there (until they get cheap.) We would need to know a lot about their performance, longevity, reliability, durability, cost, etc. before we could speculate much. Seven times faster is a big deal, that means that things like FusionIO are going to have to rethink what they are doing. And the SATA and SAS bottlenecks would be useless and we'd be forced onto direct PCIe or faster for any hope of getting the speed out of these things. But changes there have been coming regardless because already are drives are bottlenecked by the connection technologies.
If these end up the same price as current flash SSDs but are seven times faster and all other things are equal, that's amazing and we will switch right over and the flash drive is dead. But I suspect that there are many factors that we have yet to discover. And, right now, it's just a long off dream. We will have to see if they really bring these to market.
By and large, though, systems like file servers and application servers are no longer bottlenecked at the datastore layer but on the network, so I would not see most workloads having a reason to upgrade, yet.