Was looking through my office window at the data closet and (due to angle, objects, field of view) could only see one server light cluster out of the 6 racks full. And thought it would be nice to scale everything down to 2U. Then day-dreamed about a future where a warehouse data center was reduced to a single hypercube sitting alone in the vast darkness.
Physics is already hitting limits. We’re already seeing CPUs be limited by things like atom size, and the speed of light across the width of the chip. Those hard physics limitations are a large part of why quantum computing is being so heavily researched.