You can use your Eternity ring to teleport directly to your partner every 30 minutes.
You get the wedding clothes, and the wedding mount is useful I get my BF to taxi me everywhere...lol.
You also got the nice memories with your loved one! I liked the wedding cutscenes they are cute and I enjoyed it.

People wanted to be able to share a house with their eternal bond partner and a community rep said that the dev team will look into it, nothing concrete yet.