In some sense, we are starting with a very high-level and gradually refining the idea to a lower and lower levels of detail. It is structured hierarchical thinking. Right now we are at 3 levels: requirement -> spec -> code. Exposing each of these layers as structured text documents (mostly Markdown right now it seems) is powerful since each level can be independently reviewed. You can review the spec before the code is written, then review the code before it gets checked in.
My intuition is that this pattern will be highly effective for coding. And if we prove that out at scale, we should start asking: how does this pattern translate to other activities? How will this affect law, medicine, insurance, etc. Software is the tip of the iceberg and if this works then there are many possible avenues to expand this approach, and many potential startups to serve a growing market.
The key will be managing all of the documents, the levels of abstraction and the review processes. This is a totally tractable problem.