PC Perspective reports the demo was rather lackluster. The Intel Optane SSD was defnitely fast, with transfer speeds coming close to 2GB/s, but that's pretty much in-line with what Intel's P3700 SSD has to offer.
It is great to see XPoint / Optane technology being demonstrated again, but as far as demos go, this was not the best / fairest example that Intel could have put together. First of all, the 'NAND SSD' they are using is a Thunderbolt 3 connected external, which was clearly bottlenecked badly somewhere else in the chain (when was the last time you saw a 6 Gbit SATA SSD limited to only 283 MB/s?). Also, using SATA for the NAND example while using PCIe x4 NVMe for the Optane example seems a bit extreme to me.
Besides better performance, Optane also promises much better durability than flash. It's unknown when we'll see the first Optane disks in the consumer market.