This is about silo walls, not substance
What's really changing is that -- over the next decade or two, not the next year or two -- the boundary between "server" and "storage" which we hardened when we drove Fibre Channel into the industry two decades ago will soften again.
In a lot of cases, the storage is being absorbed back into servers. Sometimes all the servers. Sometimes just specialized ones.
As you walked around HPE Discover, you probably saw flash storage sitting on what we used to call memory DIMMs sitting in servers. That's a lot faster to read and write than storage in an NVMe or NVMe over Fabric device, which in turn is a lot faster than traditional storage. When application performance is proportional to (1 / storage latency), this kind of "faster" is extraordinarily important.
You probably also walked past the HPE Labs display, and learned about "The Machine". In "The Machine", a number of "servers" share a pool of nonvolatile memory -- that's the hardware for the enterprise storage for those servers.
Enterprise storage isn't really about hardware. It's about software. It's about mapping the addresses seen by the servers onto the disk drives, which is really about making disk failures, RAID, rebuilds, migrations, and the like transparent to the servers. It's about snapshots and backup, cloning and migration, thin provisioning, deduplication, and all the other features of a modern Enterprise array. These features, this (possibly hardware assisted) software, doesn't go away in a world where the storage hardware has been reabsorbed into the servers. It's just called something different, such as "software defined storage".
Observation: it takes a decade for a new storage protocol/interconnect to reach critical mass in the market -- very few proposed technologies have this level of success. Once established in that mass of customer sites, a technology like Fibre Channel has momentum that takes decades to fade away, even if a replacement technology has already reached its own critical mass.
I'm reminded of the old tradition: "The king is dead. Long live the king.".
Or in this case, "Enterprise Storage (as we've known it for the last two decades) is dead. Long live Enterprise Storage (more tightly integrated with server hardware for the next two decades)." Only customers will still be buying today's Enterprise Storage for decades to come.
(works for HPE, haven't worked in storage in this decade, speaking for self)