Google's hardware security key

Google has recently planning a replacement for two-factor
Authentication method. Since there are several threats in security , Google has recently come up with the idea of hardware key. Google's advanced protection program will include a pair of physical key that would prevent unauthorized person from accessing your account. But if you planning to get a physical key for you, I'm sorry to disappoint you because Google said it will be available to the person with high security concern like politician , corporate executive...