Problem is that despite those tools being available, I literally never use them. Ever. Nor do I have a need for them.
I kind of like the idea of being able to find bits of code in a larger codebase in a document-like format. That's actually a pretty neat innovation here.
But beyond that, I don't think I'd use this (edit: per comment thread conversation below, I'm upgrading this to not being sure if I'd used this, but it's a maybe). I need an IDE that will help me through the Battle of Stalingrad, not a basic case like a police offer pulling someone over for a speeding ticket, which is what many of these kinds of next-gen UIs always seem to show.
Basic stuff is easy enough to accomplish right now. I don't need a new IDE to help me add a button to each row in a list any quicker than I currently can with existing tools, and I feel like a core problem with these types of efforts are that they start with basic cases and never really progress from there - many engineering problems simply do not reduce down to adding a button to a screen.
That all said - I think if you pivoted and built a wiki-like overlay that could be dropped over an arbitrary codebase (e.g. extrapolate out the document-like overlay over code to document and organize a codebase), holy crap, I would instantly pay money for that, especially if it was distributed team-friendly.