I think you're underestimating the amount of "integration" Google will do with this product to make it the default everywhere. Google Plus started being integr

I think you're underestimating the amount of "integration" Google will do with this product to make it the default everywhere. Google Plus started being integrated into the search results, Picasa, Youtube comments, Android app reviews, and every other place they could think of, basically making it the default Google authentication. They eventually de-integrated Plus after tons of user complaints (and possibly seeing how horrible the product itself was).