Dallas has never had a shortage of people trying to sell the city as the next big thing.
What’s changing is the evidence.
This weekend, thousands of people are expected downtown for a celebration of African music and culture that draws artists and visitors from well beyond Texas. In North Dallas, the Mavericks have taken a formal step toward turning the old Valley View Mall property into an arena-anchored entertainment district. And at Pegasus Park, entrepreneurs are entering a Dallas accelerator that connects healthcare startups with investors, executives and mentors…