Not sure you're looking at the latest two quarters of IDC Q/Q and Y/Y growth for storage...
"Some mainstream suppliers such as EMC, HP and NetApp, are seeing a downturn in revenues from their traditional arrays."...
If you look at IDC's market share figures for storage, lately EMC and Netapp (and all others except HP) have been flat or down, but HP has increased it's storage market share by a fairly sharp margin, over the last couple of quarters. The HP 3Par product line offers AFA, hybrid/converged, and traditional/HDD all using the same controller nodes, and with all the data services (automated tiering, thin provisioning and dedupe, replication, T10 unmap and checksum, effectively unlimited snapshots, and more) that you could ask for, now including both Object and NAS directly out of the nodes. Add in the extra goodness of HW "array-off-load acceleration" via ASIC, 4-node HA, six nines of availability guaranteed, peer-motion transparent migration and other useful features that customers seem to value, I don't really believe that you do your readers a service by lumping HP in with the other two, credible storage players though they all most certainly are. Have a look at the most recent market share figures - not just the last couple of months, which can be due to random factors, but the last 6 months, say, and see if you don't agree with this assessment. The trend seems to be solid, and continuing.