QR Code Scanning
Some camera apps now have built-in barcode/QR code scanning functionality. iOS's camera app now does this automatically, and newer Android versions can do it using Google Assistant (I think. My Android is not nearly new enough to try it!). This would be a great feature to have in Camera.
When a barcode is detected, an in-app notification would appear, and you'd be able to click a button to open the content.
My biggest concern here is discoverability: it's a completely hidden feature since you can't know that it works until you try it. It could be a separate app, but that would clutter users' app drawers and possibly require an extra download.