Google is getting quite serious on the Open Identity culture with release Account Chooser V4 , its most certain that in the near future we find websites and online services switch to this culture and for the simple reason that it makes user’s life world over simple when being online at age we have number of online accounts may it be our email, corporate networks , social networks, groups and individual community or web services.
The below video explains what in store with Account Chooser.
Want to learn more: Account Chooser.