Played with it a bit and it’s very handy!
Available in latest 2018.3. Official sample project :
https://github.com/Unity-Technologies/2d-animation-v2-samples
Use Photoshop to export .psb file and then import it to Unity. Just open up sprite editor to add geometries and set bones.
Drag the object to the scene and then everything’s there! Play with it using animation / physics / whatever 😀
Ming Wai Chan 