The DFW Metroplex consists of 25 (probably more) small cities and towns, and that's where the growth is. 'Burbs such as Irving, Southlake, Mansfield, Euless, Plano, Allen, et al are integral parts of the Metroplex.
Dallas is very liberal, while the 'Burbs are very conservative.
Dallas simply benefits by the vitality of the communities that surround it.
Downtown Dallas will look like Detroit in about 20 years.