I mean it's not like your TV ever truly turns "off", is it? A lot of them power on at least the red/green LED light showing that it's "off" and who knows what else.
Try this: Switch TV to standby then turn on. Time how long this takes. Unplug TV for 30 seconds plug in and then turn on. It will take a while for the TV to boot from cold start.
Manufacturers have been doing this since CRTs.