Tessellation shader for the viewport
It's kind of annoying having to export your maps to visualize how your height maps will look with parallax or tessellation, and it'd be amazing to have this kind of feature in the editor like Designer has
I really hope this feature request could get more focus. This could open up a lot of things when used in combination with substance designer.
I recently ran into this while making height maps for Unity 5 - the textures looked fine in SP, but were crazy over-exaggerated in Unity! Adding parallax occlusion support to the viewport would really help line up SP with the final product. Voted!