Our recent look at the idea of using ARM processors to pack large numbers of low-power, high-density Web servers into very little physical space generated quite a bit of interest, and it seems that a lot of people are thinking along these lines. Indeed, every time we cover the so-called "physicalization" fad—i.e., placing multiple tiny systems in a rack unit, instead of running multiple virtual machines on a single 1U system—we get a fresh wave of feedback on just how seriously datacenter builders are taking this idea.