Autotune helps musicians to observe, modify and tweak every note of a song. That also includes modification of notes played by instruments (not just voice). The idea behind autotune was to smooth out the imperfections of singers, who could go off tune on some notes, especially when singing long passages. The idea is great on paper but if you think about it critically, it is very flawed. The beauty of music and singers is in those little imperfections. We admire singers who are pitch perfect. Even their small imperfections lend beauty to the song. Autotune robs all these romantic elements out of a song. Anyone can sing on autotune because no matter how tone deaf the singer is, autotune smooths his/her voice out. It is like listening to a robot singing. No life…
The atmosphere you spoke about in your question, is the BG that electronic tunes impart on a song. Of course, electronic music is good (when used with discretion) but autotune on voice is horrible, as it kills the soul of the song (and that of the singer).