Earlier quoted context omitted.
> make it smart via an Apple TV I repurpose the old laptops that I seem to accumulate for this. Just about anything made in the last 10 years can handle at least 1080p video, and will have an HDMI output. I add a small wireless keyboard and use my regular desktop environment. But you can add a remote and use one of the open source media centre suites. I do wish more TVs had a monitor-like sleep mode and accepted the…
We do the same and it works well. We prefer a handheld keyboard/mouse to control it. We've tried several and the Lenovo N5902 [1] is our favorite by far. It's also useful to have the Unified Remote server [2] running on the media computer so you can control it from your phone when you need to. [1] https://www.newegg.com/p/09N-00A7-00001 [2] https://www.unifiedremote.com/
(not sure if it's discontinued btw; I struggled to find it in Canada last few years; but there are seemingly-identical unbranded alternatives usually available on amazon, e.g. https://www.amazon.ca/gp/product/B08H8LH7GP/ )