I can imagine good and bad coming out of its disappearance, depending on how AutoTune is used. On the one hand, it certainly covers up a lot of flaws in vocal performance. But so much interesting artistry has come out of it too -- specifically, an album like "808s and Heartbreak."
If we lost autotune artists would be required to be able to hold a note which realistically isn't going to happen for everyone. Singers aren't what they used to be, in the good ole day's singers did not have to be gorgeous models because their beauty was in the voice but nowadays it seems to be more important to look good in a bikini than to be a real musician