Energy allows you to trade one thing against another. For instance, we have a "white sand" shortage (for making chips). (Vastly) more energy would mean more kinds of sand would be perfectly fine for production.
So energy is special: it is the universal input to industrial processes. Unlimited energy would make almost anything (more) plentiful. We'd essentially have more of what people want, whatever that is. So yes, more and cheaper housing in dense cities, but it's probably easier to see that faster and better transport options would result. That limits everything, not just manufacturing.
So energy is special: it is the universal input to industrial processes. Unlimited energy would make almost anything (more) plentiful. We'd essentially have more of what people want, whatever that is. So yes, more and cheaper housing in dense cities, but it's probably easier to see that faster and better transport options would result. That limits everything, not just manufacturing.