Sign into Google+ using Facebook?

Google announced simpler sign-ups for Yahoo! users with OpenId last year.

Yahoo opened up to third party authentication with Facebook/Google ids earlier this year.

A lot of other sites across the internet allow sign ups with OpenIds. There are several providers, like AOL, Microsoft, IBM (Surprise, surprise), BBC (More surprise), but Google and Facebook have become the de facto standards. Okay, Facebook's login is not an Open Id per se, it is much more than that, but that is a topic for another discussion, or another blogpost, if you will.

GMail was a competition to Yahoo mail when it was launched, very similar to Google search and Yahoo search. Over time, some Yahoo Mail users have stuck back, though Google has surpassed Yahoo on the search front so much so that Yahoo is not even visible as a mole from the Mountain View based search mountain of Google. The other fields have remained more or less distinct, for example Yahoo content, Google apps, etc. Using each other's ids as open ids then does not harm much, on the contrary, it tries to build a better web by using the best of both worlds.

Facebook, however, had a different vision, not from inception but at least in the past two years (after the launch of the Like button), which is, to rule the web, worded roughly. Google already had that in mind and has been working hard all these years and has been quite successful.

Both of these two warring giants aim at getting the most number of users in their kitty. The larger the number of users, the more they know about individual preferences, and the more they can customize the user experience to match what they expect. There is, however, a huge overlap between the two sets of users. It will be a boon to the mankind if both the sets of users are consolidated. Though Google and Facebook becoming one is almost impossible, I was wondering if there can be a day when we could read news like this:

Facebook joins hands with Google and lets Googlers login to FB using their Open Id.

Or:

Google gives up, believes it is saturated and cannot entice more users to Google+, lets the loyal ones connect to Google using Facebook.