Passwordless logins make total sense. I hope everyone will go that way.

 https://medium.freecodecamp.com/360-million-reasons-to-destroy-all-passwords-9a100b2b5001#.36tcte81v 

One thing to think about no matter if though is that your email account is the one key account that allows you to make use of passwordless login or password reset in case of forgotten passwords. As stated in the article: "your email account is the skeleton key to your life". If you loose access and can't recover you are screwed. So: keep it secret, keep it safe!