I think a key missing feature is the ability to embed items into an interface.
I think this could take one of two (or both) forms.
1. A field that functions kind of like a "document" field. You insert an embed link. When viewed in a base, or in a grid/list view, it just shows as a preview - But when viewed in a record details pane - it translates to a custom sizable-embedded page. Each record's embedded view is based on the link in the field - just like the Button field type.
2. A "hard-coded" form - kind of like the difference between the "button field type" and the buttons you can set up in an interface. In the from-scratch interface builder - there would be a new element type called "Embed" where you could manual populate to with whatever embedded link needed. For example a google doc - or a news feed, etc.
This by itself would accomplish half of the ideas that users have been putting forward for new automation triggers and integrations.
