It'd be interesting to gather some actual statistics. I can't look at a screen for more than a minute as a passenger without starting to feel a twinge in my gut.

If you're looking for non drowsy options, I've found ginger capsules to be very effective as an anti nausea treatment.

Supposedly 1/3 of people are "highly susceptible".

And of those, how many does this help, and how much? Like does this mean I could look at a map application while my wife drives for a few minutes and be ok? Or does it help a lot of people be able to read for a long time?

In my family, Apple's implementation helps only a small amount if at all. I'd also love to see some real statistics. What I think is really missing is coverage of peripheral vision, so maybe a similar feature built into AR glasses could be a real solution.