If speed and reliability is needed, or desirable, you've already been doing this. My TV boxes have always been wired, because wifi is silly for (relatively) high bandwidth at fixed locations, given that wires in the wall have either been there or reasonable to add.

Some places, adding wires is expensive and given that wifi has improved over the years, it might not be worth the cost of adding wires.

I think it's safe to say that most smart TVs are wireless and will stay that way. Personally, I have no problem streaming 4K content to my TV over my wifi. Adding wires where they're not needed is what's silly.