Investors, politicians, community organizers and project team members gather around the unveiled view of the proposed hotel to be built across from the downtown Boston Convention and Exhibition Center. The project, in part, has been to create a new model of unprecedented representation by minority- and women-owned businesses, infusing the Boston economy with a new business diversity. Gov. Charlie Baker, Lt. Gov. Karyn Polito, Mayor Marty Walsh and Massport CEO Tom Glynn also joined in the celebration of the $550 million, 1000-room hotel.