This thread feels very...Hacker News Bubble? Why is everyone so confused that smart TVs are popular? Being able to just turn on your TV and open Netflix without messing around with inputs/other devices is a huge benefit for non-technological people. And it probably costs <$50 for the manufacturer to include whatever chip is running linux in the TV, its a no-brainer.
The software in the newer LG OLEDs is so good I haven't bothered hooking up any of my boxes to my new TVs. I'm sure in a few years the UI will start to feel sluggish and it will be time to plug something in, but for now its a great experience, far better than any smart TV I've used before.
My go-to example on LG OLED is Spotify. It's so not OLED friendly, it's essentially OLED-hostile. The UI during playback is completely static and nearly seems designed to cause burn-in.