Yes, of course that is a great hypothetical option for 30-50 years from now.
We and our children don't have time to wait for that.
Next you're going to tell me if I just wait till fusion works we'll all be saved and can power these "atmospheric processors" with those!
Nope, I won't. Because anything except aneutronic fusion will be much dirtier than the 'nukes' we have now. Which is hypothetical right now, and maybe stays so forever.
Which can't be said about 'nukes', neither the ones we have, or the ones we could have with a little bit of more investment into materials science. (Liquid salt, etc.)
We and our children won't make it with 'renewables' alone, because they emit at least as much greenhouse gasses, or more when you consider all the externalities going into their production. They are not the solution.
Edit: /me mumbling something like 'Look into fucking GESAMTSTOFFMENGENKREISLAUF'
Even after a few decades late into the game?
What is so hard to get about the idea that we can actually modulate the greenhouse gasses in our atmosphere, now that we know that and how they influence our living conditions?
It would even make sense to have something like this in case of the next supervolcano eruption. Call it 'weather control done right', if you like.