Google hasn't released or announced anything yet but the presentation seems legit and the uploader identifies himself as Vladimir Dolgov - head of Google Russia[1].
I'm not a big fan of the Google+ UI, but it's simple and I've always wanted Google to better integrate (or merge) all their products into a single Web application - à la Facebook. In the end, they might have to manage only one design and provide one search box for all public[2], social[3] and personal searches (à la Greplin[4]).
[1] http://www.businessweek.com/magazine/content/08_27/b40910604...
[2] http://googleblog.blogspot.fr/2007/05/universal-search-best-...
[3] http://googleblog.blogspot.fr/2009/10/introducing-google-soc...