This looks pretty neat so far, and I'll probably try it out. What I really liked from the demo was that the queries get rendered into the actual markdown file.
I've been using Obsidian a lot lately, and one of the downsides to something like the dataview plugin is that the results of the queries are only available within the app. I can't open up the .md file in vim/emacs/vscode and see the same results.
With emacs, I relied quite a bit on this sort of functionality too so it's been annoying me lately to not have it.