TVs are optimized for TV usage, meaning a distance of something like more than 2m and up, in general not static content, etc.
If you sit at that distance and watch mainly content in motion, all is fine – if you are closer, they are not optimal – color profiles and sharpness algorithms are not the same.
Additionally to that the TV might not be optimized for higher FPS etc (because movies / TV shows are somewhere around 50/60 FPS in general while computer output can be much faster), but that depends.
Short answer: It is best to use the TV / display for its intended usecase.
If you will notice the difference depends a little bit on you... some can see a big difference between 60 Hz vs 144 Hz vs 240 Hz, HDR, color corrections, brightnesslevels, etc. some do not.
So the answer is a little bit: It depends.
Best regards
*Fuchur*