If it's the streetcars with overhead cabling, personally I think they're an eye sore.
I've been watching them build the route through Las Colinas, at first I thought the way they were routing them over 114 was going to look pretty cool, then they added power power poles and cablings along the entire route and I swear it looked as if they went 8 decades back in time.
In a word: Blight!
That's DART's Orange line going through Las Colinas, that's light rail - not a streetcar.
Whereas I will agree, running a streetcar line on a street one block away major arterial street is workable, it's not in Fort Worth.
Here's why, freight railroad lines surround downtown Fort Worth in every compass direction, streetcars must go over or under them, and only major arterial streets in Fort Worth do so, and not all of them do.
Let's refresh our memories of the railroad lines surrounding downtown Fort Worth. The FWWR lies to the west and north, the UP to the south, and the TRE, UP, and BNSF to the east. To the northeast, the FWWR turns into the Cotton Belt.
Only three streets cross the FWWR with grade separation leaving downtown Fort Worth; Lancaster, I-30, and Rosedale - all heading west. I-35W crosses the Cotton Belt with grade separation heading north. Heading east, TX 347 Spur (extension of TX 121), 3rd-4th Street, TX 280 (extension of US 287), I--30, Lancaster, Vickery, and Rosedale have grade separations. To the South, I-35W, Main, Jennings, Henderson, and 8th have grade separations. Will you agree with me that controlled access highways are poor choices to run streetcars on? That would eliminate I-30, I-35W, TX 347 Spur, TX 280 as viable choices. Rosedale and Vickery aren't technically in downtown Fort Worth, so we should eliminate them too. We're left with South Main, Jennings, Henderson and 8th (to the south); 3rd-4th Street (to the east) and Lancaster (to both the east and west) as viable streetcar routes as is. That's assuming the structures are strong enough to carry relatively heavy streetcars. Note: not one existing city street to the north is grade separated.
Of course, grade separations over or under freight railroad lines can be built where needed, but that will immediately add $25 Million or so capital costs to any streetcar project. If Fort Worth plans to use targeted property tax zones to fund them, they'll be hard pressed to find that additional $25 Million. Therefore, the few viable streets for a relative cheap to build streetcar lines to leave downtown Fort Worth are very limited.