Not a big surprise to us, but all positive news about Detroit is welcome. I'm not sure it qualifies as the heart of the city however.

Detroit: The heart of the city, Detroit's Midtown is rapidly developing into a surprisingly well-rounded residential area while featuring an abundance of restaurants, galleries, community gardens and markets. Dedicated local entrepreneurs have made Midtown an attractive hub for small businesses with high-end shops like Hugh and Nora, eateries like Maccabee's at Midtown and Great Lakes Coffee Roasting Company and Shinola, which makes American-made bicycles, watches, leather goods and journals. Midtown is at the core of the city's M-1 Rail development and non-motorized transportation plans will soon connect the district to Eastern Market and other neighborhoods via greenways and bike paths.
USA Today Article