Is there such a thing? I've done some searching and I can't find anything.
These are just prelim, brainstorm like ideas.
What would that look like, and why is it important?
A 3d font format would be parametric and allow inputs like bevel, embossing, etc. It could be several layered typefaces that do boolean operations on each other to achieve 3d effects. It obviously doesn't need to be exclusive to text; decorative patterns could be done.
Customization of 3d printed products, like jewelery, cups, etc.
3d displays like Magic Leap and Hololens.