[rincebrain]

In any situation where power and cooling are effectively not your bottleneck, density becomes a limit on how much you can put in your server room. (Even if they eventually become your bottleneck, you might conceive of a situation where you build out to 75% capacity in 50% or less of the space to let you put in more efficient future versions in the other physical volume, or something.)

I would imagine any of the big cloud providers, for the ones providing x86, would probably love to buy something like this to improve the density of what they can offer...