I was about to write back that we are not far off the advances to make these affordable and then did a google search and found that you can get a distilled unit on Amazon for $180 that is capable of making a gallon in 5 hours for about $.45 worth of electricity. That is far less than what it costs to buy distilled water at the store, which is around $1 a gallon. If you look at this from a break-even analysis, you technically start to reap the rewards of ownership after about 800 uses since the first 400 uses basically cost you $1.45 per gallon, then the next 400 costs you $.45 per gallon, but you are recouping that extra cost over the $1 retail price, so by the 800th use, you are getting water at less than half the price of the store.
Even with fission, nuclear is a panacea of energy with almost no waste for modern reactors. I can see there being an initial rise in energy costs to get those projects built out though. If they are phasing out nuclear, that would be dumb.
Additionally, researchers at MIT recently found that you can evaporate water without heat, so that should hopefully be a thing in the near future.