A good strategy would seem to be a scale-out approach to storage with an increasing commoditisation at the disk level and the functionality provided at a storage server level. HP can drive huge economies of scale as it buys more disk drives than everyone else put together and have >50% market share in blades. A commoditised (and very low cost) scalable shared disk pool, with storage engines (read blades maybe?) running Left Hand, Ibrix, maybe an EVA-type firmware, maybe a virtual tape engine, etc, etc, sounds a good solution. Engines could be combined to provide more performance, engines could have their purpose changed as requirements changed.
People don't buy mid-range or enterprise storage because they want it. They buy it because they have a requirement for storage with mid-range or enterprise characteristics. If you can give low cost components the performance, resilience and functionality of enterprise class storage without having to invest in large, inflexible silo'd solutions then why wouldn't you? Beats the crap out of the 'just buy a bigger pair of controllers' approach.