For movies, Maybe. For gaming, definitely not. The picture comparison before and after is CLEARLY far superior with Dynamic Tonemap off and in game calibration. The Dynamic tonemap on makes for washed out whites and overly dark areas. Playing MW more than anything makes this apparent. I have not compared back and forth for movies to yet ascertain my own opinion there, but for gaming I have.But you need tonemap by standard! The tv cannot even do 1000 nits, so tonemap is always needed to put 1000 and more highlights to ~~850 nits.
For a VERY clear example load up Azhir Cave in MW. Go to the cave entrance on the "A" side (for dominion). Looks at the rocks to the left and inside cave entrance. With Dynamic Tonemap on the rocks are super shiny white like they are the glossiest rocks on the planet, and you cant see in the cave at all. Turn Dynamic Tonemap off (or set to HGIG which turns it off as well) and re-calibrate and then look again. Rocks are super brightened by the sunlight but WITH detail not just sunlight, and now you can actually see detail inside the cave not just a black wall. Again this is just one example, but the difference in gaming is night and day and Dynamic Tonemap definitely does NOT produce what the game makers intended you to see. If all you care about is being blinded by the brightest of glosswash and unable to see in dark areas then by all means keep it on .