A new test on iOS surfaces related content cards including photos of restaurants you say you’re at, friends who’ve checked in where you did, photos of friends you check in with or mention in a status, and friends who listened to a song you just posted. The cards make News Feed feel alive.
The new feature is currently rolling out to a small subset of iOS users. You can see a screenshot below of an example of two different posts. For instance the card on the right could appear if you post a status saying you're “watching Grand Budapest Hotel". If you're on the latest Facebook app, we can expect to see the changes sometime soon as the update is coming out OTA.