VMware sees this new class of Optane SSDs as a vehicle to help increase vSAN's utility when it comes to big data analytics, business critical apps and VDI (amongst others). In these environments though the cache is much more active than the use case above, so it remains to be seen just what the P4800X can do when under a diverse load. The potential is promising though, considering the P4800X is just a drop in card with nothing new required at the node or vSAN level. For its part, VMware has done well to show their customers that new technology can be easily included in their HCI stack.
VMware vSAN First HCI To Support Intel Optane