If a display manufacturer produced a quality display and supported something like this, I wouldn't mind paying a good deal extra for it. I wouldn't even mind if it shipped with a proprietary OS and I had to do the installation myself. I'd love to see Framework or Purism make a Linux powered smart TV.
NEC has commercial displays with builtin Pi CM4s. https://www.sharpnecdisplays.us/products/displays/ma551-mpi4...
I'm sure smart TVs make some money off data tracking, I know it's a part of Roku's business model. But I feel like most of the additional cost in this went to the "commercial grade" features. It can be left on at full brightness for months on end. It can probably withstand a kick from a teenager at the mall. The 3 year commercial warranty also probably has some actual urgency behind the support.
Do any non smart models exist that aren't targeting commercial usage? It's probably not practical, thr market for that is probably 0.01% of the total TV market.