Intel have made great claims about Optane before, and delivered in the end something which barely matches a modern SSD (and therefore does not justify the vendor lock-in or the software performance pitfall of adding yet another slower storage device to the virtual address space). I will wait for a more impressive product before calling this the future of storage.
Moreover, asynchronous I/O is mostly used for network I/O, not disk I/O. Because for disk, we pay the price of yet another stupid legacy decision, namely the Linux kernel devs declaring that you do not need asynchronous storage I/O as the disk cache will take care of everything for you. Tell that to performance engineers who have to debug latency spikes caused by software randomly blocking, now that every pointer dereference can turn into a disk access...