Since all data lives in a single conceptual space, you start seeing community services like https://constellation.microcosm.blue/ (backlinks without running your own index), https://slices.network/ (indexes data you want and gives you a GraphQL/REST endpoint), independent relays (https://atproto.africa/), and so on.
To give you an example, https://slices-teal-relay.bigmoves.deno.net/ is a demo of Slices showing the latest teal.fm records (like Last.fm scrobbles). The thing is, teal.fm is not even launched as an app. It's just its developers already listen to music through it, the records get created in their repos, and so any other developer can aggregate their records and display them.
It's a web of realtime hyperlinked JSON created by different apps. That's exciting.