Here is a statement from Bluetooth:

Today, Bluetooth point of interest (PoI) information solutions are enhancing the visitor experience within museums and retail stores around the world. Millions of people rely on Bluetooth item finding solutions to track down lost keys and other personal items. Bluetooth indoor positioning systems (IPS) are helping millions of travelers navigate through busy airports and shoppers through malls.

What’s in store for Bluetooth 5.1?

In this latest update to the specification, Bluetooth adds the ability to allow for a device to detect the direction the signal’s emitting, increasing its accuracy and usability.

The Bluetooth SIG, the group that develops the specification, says this system improves down to “centimeter-level location accuracy.”

Rather than a single antenna on the transmitter or receiver (depending on application), a Bluetooth device has an array of antennas. By measuring the strength of the signals on each antenna in the array, the other device can determine which is strongest and thereby obtain a direction vector. Proximity and positioning.

Now for manufacturers to implement it into devices we can buy.