I live in Dallas, and in general downtowns in the area are somewhat revitalized, at least as far as the cities themselves have pushed it.
Downtown Dallas had the usual problems that downtown areas had in the 1970s through 1990s- lots of commercial space and some venerable old hotels, but not much else. The city has been putting effort into revitalizing it- we now have a pretty slick farmer’s market, several entertainment venues, bars, restaurants, some nightclubs (mostly in the West End near Dealey Plaza), new fine arts venues, a new natural history museum, etc… The “uptown” area immediately north of downtown has undergone a renaissance in the last 20 years, as has Deep Ellum immediately to the east.
Downtown Fort Worth is pretty cool, with Sundance Square (an area of clubs/bars/restaurants), the Bass Performance Hall and many other places nearby. And it’s very close to the Stockyards and Cultural district (Dickies Arena, Amon Carter museum, Kimbell Art Museum (well worth a visit!) , Will Rogers Auditorium, etc…), so it makes for a fun place to visit.
Other cities in the area are more spotty- some have made effort into revitalizing their downtown areas, and others have not.
Downtown Richardson is less cool; it seems to be a lot of hookah joints, halal barbecue and Indo-Pakistani groceries for the most part. Downtown Plano is neat on 15th for about 3 blocks, where there are some cool restaurants (shout out to Jorg’s Cafe Vienna!), shops and bars. Downtown Frisco is neat, but humongously commercialized. It’s not historic or anything- everything there is less than 20 years old. Downtown Carrollton and downtown Grapevine are cool- there’s some historic stuff, some restaurants, etc…
I couldn’t even tell you where downtown Arlington, Mesquite, Grand Prairie, Irving or Lewisville are- they just don’t seem to have anything noteworthy that I’ve heard of. I know where downtown Garland is, but there’s nothing there. I suppose it’s commercially viable, but it’s not a destination.