Apple AirTags
We’ve known about AirTags for what seems like ages. These are little trackers that you’ll be able to attach to all sorts of things and track them to see their location, even in AR.
The system will almost certainly work natively with Apple’s Find My app, making it an excellent addition for Apple users looking for dependable trackers.
Rumor has it, they haven’t been released yet simply because people are losing less stuff in quarantine; but if it’s finally time, the March event is the place to announce them.