Several text strings uncovered by MacRumors indicate that you’ll be able to turn on the feature, with one noting, “If you’re on an airplane, you’ll need to keep Travel Mode on to continue using your Apple Vision Pro.” It also prompts the user to “remain stationary in Travel Mode,” likely to avoid wearers flailing around while wearing the headset and disturbing whoever’s sitting next to them.
It’s still unclear what all this means and how Travel Mode might work. But…