If the technology is implemented, it will be possible to hide, for example blur, the contents of the screen on iPhones, making it impossible for other people to see. At the same time, it will be possible to see the contents of the screen only with the help of special glasses. What exactly is the claimed technology and how it will work is not yet known.
As noted, on the basis of such technology, Apple will be able to create a mixed reality device in the future. But the registration of a patent does not mean that the technology will be implemented, at least in the near future.