As suggested in the comments, the construction is called 'left dislocation'. The term stems from Haj Ross's 1967 dissertation, Constraints on Variables in Syntax (warning: large file, slow to load). An article detailing the history and present-day use of the construction is available at Language Log. From that article:
Executive summary: This construction goes back to Old English, and is still widely used in spoken English and in some regional varieties ; but its use in formal written English has been decreasing since about 1500, and is now either informal or archaic.
In the conclusion of that article, these more detailed observations are made:
Left dislocation is certainly grammatical in English. Up to 1500 or so, roughly one in every 100 or 200 sentences had this form, even in formal writing, and a similar frequency of use continues in spoken English to this day. Over the past few centuries, the frequency of this construction in standard written English has been declining, and it's now quite rare except in archaic styles, in representations of speech, or in informal styles that use spoken-language norms. Therefore Jim's claim that the issue is one of style rather than grammaticality is correct, ....
(Emphasis mine. Excerpts from "Left Dislocation", Language Log entry dated September 24, 2008, retrieved 4 Nov 2015.)