Google developer team trying to roll out new login page to users.Google’s sign-in page can display a list of accounts that you've previously used with a specific browser. So here after you no need re-enter your email and password to sign-in other accounts.
How to Enable:
- When you login to your account make sure “Stay signed in” checkbox ticked.
- First go to this page and click the enable this feature link then add your accounts to show.
- In the future to sign in, simply click the account entry for the account you'd like to use.
Be careful you dont enable this feature on public computers.