Today's grid is split into two half-puzzles by a wall down the middle, which creates the theme answers at 19A/20A, 35A/37A, and 50A/52A. I figured out the theme in the middle, with WOLFOF / [WALL] / STREET. Initially I thought about WOLFOF / wallsT, which is not at all the name of the movie, but then got it right shortly thereafter.
19A: With 20-Across, pattern in back of a window (DESKTOP / [WALL] / PAPER) was challenging. It took me a while to realize that we were talking about computers. STONE / [WALL] / JACKSON was well-known to me from my years of obsessing over the Civil War. I recommend Shelby Foote's three volume history if you want to take a deep dive.
So is it enough? It's a small amount of theme material, unless you count the 15 squares of black down the center as theme. On the other hand, the two halves of puzzle are wide open, with a lot of excellent fill, including SOFTSPOKEN and SPELUNKING. 15A: Author known for the intelligence of his writing? (LECARRE) is an amazing twisty clue, just like the novels referred to.
My error came at 38D: Lightweight boxer? (PUP). I convinced myself that PUg would work here - that somehow, a pug was just a very small boxer. Ignoring of course that gEN could never work as the answer for 45A: Boardom? (PEN). Ah well.
I think overall I liked it, even if it had fewer Aha! moments than a typical Thursday.