They sent an email today and i quote:

What’s coming next in Proton Pass?

Password Sharing: You will be able to share your logins, secure notes, email aliases, and credit card information with other people, keeping your data end-to-end encrypted at all times.
Web app: This will let you conveniently manage your data or open Proton Pass in a full browser tab instead of the browser extension.
Desktop apps: With apps for Windows, Linux and macOS, you’ll have better offline support and better integration with your deviceʼs operating system.