Joy-Con IR camera has another use?

[Platina]

If you are holding the controller the way it's supposed to be held, I think the motion sensors are enough to determine which is down. Technology is improving so I'm sure they found a work around for the sensor bar but using the IR camera for this would be a bit odd in my opinion

Probably there for whatever handwaving features Nintendo wants to add to their games, but I don't see this being used much :/