Honing with Torque Plates - How Important?

If you're really keen on getting your bores the perfect shape, you'll find a shop who can do a "hot hone". The block is warmed up before it's bored, so that it's the perfect shape when the motor is at operating temprature. I don't know how much of an advantge that would give over just using a torque plate though. I don't even know if any shops near me can do it. Can hurt though aye!