Comment What a terrible idea (Score 4, Interesting) 51
Your phone is already considered a something-you-have type of authentication in use (whence SMS authentication). Adding a YubiKey there doesn't add much more security to that, it's just a slightly from of the same class of authentication: the something-you-have class.
So this article already starts with a terrible idea: if you stop using passwords because of this you will be going from double authentication (something-you-know and something-you-have) to just single authentication (something-you-have), getting worse overall security because it's not double authentication anymore.
The use case of someone robbing you of your phone will be awesome, because now you also need to carry the key around to use your phone properly, so they can steal the YubiKey as well.