A likely scenario is that, just as with mobile OSes or browsers, there will be effectively an oligarchy or cartel of approved FIDO device manufacturers, who wil

A likely scenario is that, just as with mobile OSes or browsers, there will be effectively an oligarchy or cartel of approved FIDO device manufacturers, who will end up setting the rules to make it hard for new manufacturers to join the trusted set. This is basically a huge coordination problem, and there are natural barriers to entry against becoming a globally accepted provider of hardware which websites are prepared to trust. History has shown that, as long as a market appears to have two options, people will be content to choose the lesser or two evils rather than invest time and effort into changing the system to add more options.