I just use an old macbook air with a bluetooth keyboard that also has a touchpad. The thing is in sleep mode when not needed, so it wakes up fast and does not need a lot of energy. With that setup I can access whatever media I want, have a solid adblocker and a browser with a real keyboard.
> with a bluetooth keyboard that also has a touchpad
Different strokes for different folks, having to use a keyboard to control my TV is for me one of those usability compromises I preferred to avoid. It's probably related to how I use the TV, things like browsing the web were never on the list of requirements. I'll have a phone, tablet, or laptop at hand for that.