There is a lengthy discussion https://www.reddit.com/r/pcgaming/comments/5aa7w5/confirmed_120fps_fix_for_skyrim/ about this. I suggest you read the whole thing. Quite interesting. But as the reddit OP says: The long-term effects are not known, so BACK UP YOUR SAVES and USE AT YOUR OWN RISK!

Currently I'm testing this at 75fps/hz myself, and so far I haven't come across any physics issues. So it'll be interesting to see if that continues. I posted this over at the new beta community as well.