I would imagine most people don't go behind their TV hook up their little HDMI dongle every time they want to use it, so it seems reasonable to have a comparabl

I would imagine most people don't go behind their TV hook up their little HDMI dongle every time they want to use it, so it seems reasonable to have a comparable wattage drawn when it's built-in -- but this is significantly higher than what it looks like an idle Chromecast draws (1.8-2W). Why is it so much more?