The interesting difference here is that "not looking like a HWW" is actually a good thing as it's more discrete. So if HWWs converged on a common design, the outlier would have the advantage as it's less easily recognizable by a thief.

My guess is that we'll see a convergence of common features (air-gapped, cameras, etc.) but the shell that houses these components will be highly subject to change and will cycle in and out of fashion.

Perhaps customers also like adding a bit of flair and mystique to their back-up schemes? This seems more relevant to the steel-backups we have on the market, where there are a bajillion different designs out there and basically all of them are inferior to a simple stamped sheet.