I think they're doing something functionally similar, which is basically contact list management into groups. They call it "Aspects" iirc.
I think the problem with that is that it creates weirdly asynchronous or non-cohesive groups. I.e. if I have a list called work friends, it's not necessarily the same as your list called work friends, and the stuff I share to my list doesn't go to the same set of people.
In the "Places" paradigm, the groups would be more canonical and autonomous and transparent to the people in the group.