It feels like this is the key to unlocking useful AR [1] for low powered, lightweight headsets. If the heavy lifting for locating and interacting with objects in 4D space is done with UWB, you don't need to do too much computational heavy-lifting - reducing bulk, increasing available space for batteries and reducing battery draw.
[1] Right now I can't really see a killer app for AR, something that would make you super-human enough to want a layer of abstraction between you and the real world. However if I could remotely interact with objects through walls, like turning off a lamp in a bedroom or seeing where my wife is and opening up a audio chat with her so that we're not yelling to hear each other, all of a sudden the trade off of having to charge and wear another device seems less annoying. All of a sudden you have powers not unlike a sorcerer.
[1] Right now I can't really see a killer app for AR, something that would make you super-human enough to want a layer of abstraction between you and the real world. However if I could remotely interact with objects through walls, like turning off a lamp in a bedroom or seeing where my wife is and opening up a audio chat with her so that we're not yelling to hear each other, all of a sudden the trade off of having to charge and wear another device seems less annoying. All of a sudden you have powers not unlike a sorcerer.