Look at digital signage. The high-end ones are the same kind of display hardware as consumer TVs, but designed for 24/7 operation and overall greater durability, as well as generally having much higher maximum brightness. Of course, you'll also pay a premium for that quality bump.
We have a Samsung smart TV. The smart TV features have never been activated. There are no apps, and it has never been connected to the internet. For connectivity, we use a roku, a laptop, and whatever board I feel like playing around with. For all intents and purposes, the TV is a dumb TV with a somewhat decent screen.