Not to diminish this excellent work, but:
1) I never want to search all repos globally. At worst I want to search all of my org's repos.
2) the search UI is a little clunky, in a way I'd need to be using it again to remember.
Between those two I think there's loads of progress to be made outside of raw search power. Of course it's nice to have that, but that's what I'm really after.