I would not be in favor of it.
On one hand, adding an explicit power requirement which has to be met means adding micromanagement to planets and colonies that doesn't add a lot of meaningful gameplay in exchange. What I mean is that where presently we have the interesting decision of deciding what facilities, etc. to build with planetside industry, adding a power requirement reduces the decision-making because some fraction of industry is forced to go to power production to keep industry running.
On the other hand, if it isn't a mandatory requirement then what does it really add in terms of gameplay? If I want increased factory output, I can just build more factories which, once built, don't cost me any extra minerals to get production from. Reducing the amount of population needed is interesting, but probably better served by a new Automated Factory installation which doesn't need to rely on a complicated power system, it can just be 2x the cost like automines are compared to normal mines.
It is worth noting that we already have this capability, by the way, in the form of CON components for ground units. While there's some lead time involved, this does mean we can convert a relatively underused mineral (vendarite) into population-free industry fairly effectively, although some players report that there is a lead time while the CON units fortify before they will build anything.