Very interesting! I'm glad to see more development in the field of Personal Knowledge Management. There's a lot of cool features Obsidian has which are essential to me:

1. Markdown 2. Ability to create a Zettelkasten 3. Backlinks

What it currently lacks for me is: 1. native iOS app (one app for all note-taking. This is why I can't see myself using Roam Research right now, despite it being a pretty cool project)

Good job to the dev team and will keep a closed eye on this project :)