While many of us are enamored by the vision of a software-defined data center (SDDC), we also know that hardware will still be a very important consideration: how much, how efficient, how fast, etc.
The core technologies: disks, flash, RAM, CPU, etc. -- are evolving at a blistering pace.
The thinking around how we best assemble into architectures: servers, arrays, fabrics -- is also evolving at a blistering pace.
And it's hard to have a meaningful point-of-view on SDS unless you also have a clear point-of-view on the hardware it will inevitably use.