To turn the question sideways a bit, there's nothing stopping some conglomeration from developing an alternative to 802.11 standards. All they have to do is create the hardware, convince people to use the hardware, create software to adapt a novel protocol to the higher layers of the networking stack to make it usable by application software (including addressing all of the ways that a new lower layer inevitably breaks an abstraction or two), and create the tooling necessary to make an ecosystem of non-802.11 wireless devices easy to install, maintain, and interoperate.

... But outside of particular special applications where something about 802.11 protocols or the frequencies they communicate upon makes them an ill-fit, there aren't many reasons to do so. Good enough displaces perfect in the common case.