This old TV is 5 inches thick, but it turns on in 2 seconds. I hooked an amazon fire tv into one HDMI port. I also have a sonos "connect" hooked up to the audio-out so that I can play my TV audio through my ceiling speakers when I want.
But it's just a display, so I can plug and play the capabilities I want. I can even tell alexa to open up plex while the TV is off and the fire TV must send a signal through the hdmi port because the tv turns on and it loads plex.