In the description it is said it is only for decoration.
It could be useful if it would act as an electrified floor. To be honest this feature is quite appealing.

I thought about it, and found an implementation of this idea, but it is said on the mod page that it's not ups friendly at all

https://mods.factorio.com/mod/PoweredFloorExtended

Which is not surprising, as I believe it adds a hidden power pole on each tile. So I'm not gonna add that as a feature on this mod, but anyone is free to create a mod that uses this one as a dependency and add this feature.

But maybe there's a more UPS friendly way to do that

Perhaps doing a calculation on adding new tiles (possibly with a delayed timer to wait for changes to happen before actually doing the script) to replace the numerous poles with bigger range singular ones where possible.

So if there's an area of 15x16 tiles, there would be a 15x15 'pole', 1x10 'pole' and a 1x5 'pole. Depending on how much and which variants are made, this could really improve the situation, though I suppose an algorithm that can reliably do this calculation without overplacing is annoying to make (then again I'm just assuming stuff since I've never actually done such a thing)

Or: create a new substation entity with 9999x9999 area. Or maybe less, and paste it accordingly.

did you look at the code for platforms in space? is that a simple map-wide and invisible substation powergrid like a huge substation or is powering structures in space tied to the space platform somehow?
you might get a clue on how to make it more ups friendly from that.