I would love to see this view present in the "file search" feature to be exposed to the extensions API.

Will this change the current api? How?
add a way to render this view to the List or ListItem component.

Who will benefit with this feature?
anyone who is interested in viewing list items inline quickly, e.g. details on a github issue in the github extension, a preview of comments in the hacker news extension, file previews in the google drive extension.