wampuscat - with all due respect i would suggest you read Wi-Fi Alliances website and WiMax Forums website to get a vaster understanding and overview of your concerns.
do you really think that this concern you posed has not already been anticipated by these forums and by the companies that seek to gain sector credibility ?
its all about interoperabilty,...without that no company wants to interact with any other. additionally, with security as major concern for wireless devices there has to to a standard and interoperability that needs to be adhered to.
do your reading/due diligence and you will discover what you are inquiring.
invest at your own risk, based on your own due diligence, at your own risk tolerance