I created a maya script for the new Maya 2016.5 / extension 2, which lets you preview your lowres, non-subd geometry with supporting edges (based on hard edges).
Nothing too original, this method already existed in 3ds max.
It can be useful for hard-surface modeling.
You can get it here, for free: https://gumroad.com/products/LqYTS
bevelPreview for Maya 2016