I wish they did more with HDMI, even though HDMI is being phased out. I want to hook up my computer and have the computer gain an ethernet link from the TV, even though the TV is wirelessly connected to my router. The TV should be a "dock" that includes a 2nd monitor. I have a wireless controller reciever plugged into the USB port on the TV. I want that to give input to my computer from it. I also want my computer to charge while being hooked up to my TV. I think the only answer is this TV should have type-c and do all those things as a dock, but it's frustrating that we're 1 step behind.
I wish I could watch a program, while showing my computer hdmi input picture-in-picture. Hell this thing has 4 HDMI inputs on the back, let me do each input to a quarter of the screen. Another niche use..
Don't even get me started on the ads. Doesn't make sense to keep the TV on when my computer is locked for long periods of time, so I generally come back, turn on the TV, and unlock the computer. First thing I see is fucking ads. Takes 2 clicks on the remote to dismiss but it colors my experience that they're always pushing another $30 or $40/month service when I first see things onscreen. They know you can't get this quality elsewhere so they're happy to push you ads. And the telemetry, my god. It's my $3k TV!
Most TVs are still waiting to support the next hdmi standard so you can do 120fps & hdr simultaneously.
The 2 things that did impress me were this LG tv supporting both Miracast and Airplay with /no/ hoops to jump through. It just worked. I do wish I could "cast" things to the TV, and that's like pushing a link to it where the TV navigates to that stream and plays. No other device has to stream or push the video to the TV, it does it itself in the Chomecast paradigm. That would be nice.
</rambling>