Not intended to diminish your awesome work, I had this idea and I am so glad someone else did and implemented it!
* Could find typos in schematics
* Extract operational parameters from apps notes and data sheets, schematic understanding
What I really want is to bring up pages of the PDF documentation for a specific trace in a design.
Given you have a semantic description of pads for a part, could you merge (union) those pads with another similar part with a different outline? I'd like to hedge my bets and design a PCB that can support two different microprocessor variants or different vendors op-amps.