Xbox One will “likely” power up faster than your TV when booting from standby mode, Microsoft has claimed.
Clarifying the console’s three power states onReddit, Xbox director of product planning Albert Penello stated that “On is On. Off is Off. Standby allows “Xbox On”, quick resume, checking for updates, etc.
“[Standby] is the mode we’d like to see people in, obviously, so you get back to gaming or watching TV really quick. From standby, it’s likely the Xbox will be on before the TV is completely powered up.”