This might sound real niche, but I'd like it if the TV had a settings profile for when I'm in built in media/streaming apps.
I'm really picky about my picture quality and have my blu ray player HDMI port picture settings dialed in perfect for movies/shows... but there's a few quality of life annoyances that come with switching to that port just to watch something on Netflix.
Switching to that port always automatically powers on my Samsung K8500 UHD bluray player when I do, and I have to wait a few seconds for it to settle itself before going into an app, or it will immediately kick me out of Netflix back to the UHD player's menu screen.
More often than not, after about 15 minutes the UHD player will go to sleep and then kick me out of Netflix (or whatever app I'm using) and the TV will switch itself to the fuzzy screen TV input that nothing is connected to (I have no cable, no TV receiver etc) because it thinks that HDMI port is no longer in use. So I have to go back to the UHD player's HDMI source, go back into Netflix, and it usually sticks that second time, even after the player goes to sleep.
However, exiting fully out of a streaming app once I'm done using it causes the TV to search for a video signal and then turn the UHD player on, which usually means I have to wait a few seconds to turn it off, or at least wait for it to finish acting like it's in charge before switching over to HDMI 1 where my PS4 Pro is. If I don't wait for the player to turn off or quit trying to be in charge, it will quickly try to switch back to the player on HDMI 2 and cause the previous HDMI to dissociate it's identity as "PlayStation" and Game Console. So, after I remember that I jumped the gun, I switch back over to HDMI 1 for the PS4 Pro, where it tells me "new device connected to HDMI 1" and have to re-enter in it's name and assign it as a game console to get the easily identifiable game icon/bame back.
I also only have to enter it in manually because the auto-detection no longer works after the first time set up. The only way to get the auto identify to work is if you reset the TV, and do it during the initial set up.
So if I could just avoid all this by being able to be on any HDMI source, go to the built in Netflix, Amazon etc app and it trigger a picture settings profile of it's own, which I can match exactly to the one I have for watching movies, my QOL would be better. It would also be nice because sometimes even high quality 4K HDR stuff on Netflix has slightly different picture setting needs than disc based media does, and I could make an adjustment for just streaming media without throwing off my settings for UHD and SDR blurays playback.
Sorry for the rosetta stone, it's a doozie to explain.