>>285986093
You'll be paying extra for a bit higher refresh rate and no means of video artifacting.
The Rift S has a lower pixel persistence than the CV1, which means there will be little to no motion blur in comparison.

You won't be able to use it anywhere, that's the only downside. Some people use their Quest to watch a movie or some other misc thing before they fall asleep, if you don't do that then you could just get the S.
It's up to you if you want to use your headset outside of Desktop VR.