I think it's a good first move to differentiate vs the crowd
StoreVirtual is already a much more mature and feature rich solution than VSAN is today and critically it is hypervisor independent, with the ability to export and migrate storage outside of the hyperconverged environment to either non virtualized or non VMware guests and clusters. It also provides a lot of flexibility by being able to run in a VM, a hardware based appliance or a combination of both and can also virtualize existing DAS or SAN assets for reuse.
Not everyone will buy into hyperconverged, just like not everyone buys into converged today, refresh cycles, flexibility and budgets are such that many will continue to build infrastructure from components. I also think once you start to look at some of these hyperconverged solutions at scale the wheels start to fall off. Very few economies of scale and lots of cluster to cluster traffic and multiple copies requires plenty of external infrastructure and resultant capital and operational cost to provide performance and maintain data availability.
In reality I think there'll be a healthy mix on hyperconverged, converged and traditional roll your own infrastructure models going forward, key is not to get locked in but I see this as being very difficult to avoid with many of the hyperconverged stacks.