I haven't seen this, and don't see it when I search for pages I visit frequently.<p>Maybe it's some Google+ thing, or some other "feature" of a Google service you use?<p>Personally I would find it creepy and/or an invasion of privacy.
I feel like I've been seeing this for a while, a couple of months I think (TBH I am not very sure). It's been nice to see be able to skip to the result I used before.