So google anounced they are creating their own FIDO U2F key and will support NFC in future. YUBIKEY is a mature company that others are following suit on with their own tocken FIDO keys
Teamviewer needs to get onboard and support FIDO U2F besides Google Authenticator.
I carry my Yubikey around my neck and so easy to authenticate.
Hate having to authenticate by Google authenticator everytime I add a machine. or login online.