Love this. My TV setup is super straightforward these days, but I had a nice home theater setup in my previous house and used a rather disappointing Logitech Harmony remote.
If you want to get creative, you could create a custom dashboard and put an old iPod touch/Android device in kiosk mode and use it as a remote touch panel control for your home theater (or anything else in HomeAssistant).
I have two Lenovo M8 tablets ($100/each) that I'm using as home control panels - super convenient and rock solid. https://imgur.com/a/f0aNTRq
Yeah they're solid - come with a little dock so it looks like a high-end automation system panel. You can configure the power settings to hold the battery charge around 50% to prevent any issues with the battery swelling.
If you go this route, definitely buy the Android app FullyKiosk. It will let you lock the tablet to the HomeAssistant dashboard, automatically recover if something crashes, etc. I have it set up to use the built-in camera & motion sensor to automatically turn on the display if someone walks up to it or touches the tablet, and automatically turns the screen off after a few minutes of no motion.
If you want to get creative, you could create a custom dashboard and put an old iPod touch/Android device in kiosk mode and use it as a remote touch panel control for your home theater (or anything else in HomeAssistant).
I have two Lenovo M8 tablets ($100/each) that I'm using as home control panels - super convenient and rock solid. https://imgur.com/a/f0aNTRq