There is a cow milking (?) minigame in "1, 2, Switch", where you, well, milk a cow.
And supposedly the haptics on that feel very realistic, Laura Kate Dale said it felt like actually jerking someone off, lol.
.. and as a follow-up, she said that you can feel the milk moving from the top to the bottom as you milk, so that sounds pretty interesting.
Could be a nice addition to FPS and action games (like feeling the arrow actually leaving the bow in Zelda and stuff like that).
Tweets by Laura Dale on the topic:
https://twitter.com/LaurakBuzz/status/819937981695983616
https://twitter.com/LaurakBuzz/status/819941246907125761