I like the idea of power being modeled by the game, however that really depends on how it is implemented.
If it becomes just more micro: build x power plants to power your stuff, with no meaningful decisions needed, then it is indeed just more micro, as some other people already mentioned. I would not like that.
If instead it adds some more possible interesting choices for the player, it might be good. I operate under the assumption that TN facilities consume huge amounts of power, and so that power generation needs to be MASSIVE. Several orders of magnitude beyond what we use today.
Let us say that power can be beamed into space to other colonies in the same system, and maybe even through stabilized jump points (this might or might not need specialized equipments, like ships at the gates or similar).
In this situation, power generation does not need to be on the same planet where the power is used. So... some planets might become interesting colonization targets just because they allow for plentiful power generation.
That pressure cooker planet with impossibly strong winds might be a great target for wind power generation, even if normally you'd never consider it
That planet with very active tectonics might be great for geotermal power plants
And that scorched rock orbiting SO close to a large star, a wonderful candidate for solar power plants
Once again, this is assuming you need a HUGE amount of power, and so that normal power generation does not cut it. So you either colonize these worlds, just for the potential power they can generate.... Or you resort to Sorium powered plants, with the problem that they keep consuming a large amount of Sorium.
In my opinion this scenario is the only one which would be worth having if you track power. Because in this case, you actually have more planets that becomes colony candidates, and as always this has the potential to become a meaningful strategic choice. You then have to defend these planets and such.
Is this too much of an hassle to play around with? I don't know, I guess it depends on the person. Is this too bothersome to code? That's up to Steve. But something similar to this is the only scenario where I would like power generation to be tracked.
If instead it becomes just more mindless micro (build a plant every x other installations) then I'm not really interested.