Highlights include Sliding Sync (instant login/launch/sync), Native OIDC (industry-standard authentication), Native Group VoIP (end-to-end encrypted large-scale voice & video conferencing) and Faster Joins (lazy-loading room state when your server joins a room).
Their native group VoIP calling looks to have a solid topology that could easily replace Jitsi in the near term, and eventually compete with larger scale conferencing services like Zoom. That’s kind of exciting for those of us who care about open systems and privacy.