The desalinated water I've drank (which was an on-ship one so probably nowhere near as sophisticated a system as would be feeding a city) never managed to completely remove the salt and left water that was as refreshing as fresh water and addicting as things with salt on it.
I'll prefer the natural taste of billion-year-old-purified-by-the-sands-of-time-cave-water out of our rapidly disappearing aquifer, thank you very much, and so will all of my cows.