Great callout. I don't actually see this replacing LinkedIn profiles or resumes, more like an add-on so you can figure out more about a person. Example: "Proficient in C++", that's about as much as you get from a resume. But what projects did I use C++ in? What tooling did I use? Did it ship in a product?
Better yet, the interactive profile should say 'yes, they worked on C++ on these projects, here's a link to the specific github project'.
Eventually, if this turns out to actually be a good idea and gain traction, I'd want to build recruiter/candidate matching tools that let you just ask 'I need someone who's worked on Raytracing Shader Compilers before'. Something very narrow and specialized and it should still be able to bring up the 50 people in the world who have that intersection, then you can ask those people's profiles for more about their experience.
Other crazy idea: The resume and linked in profiles are like the table of contents of your career. Why do I have to write the table of contents and not just generate from my append-only work history. The table of contents of documents are generated, why is my resume not generated from something persistent instead.