Seems pretty straightforward.

1. I am a devolver and I (or a spouse/child/friend) get motion sickness when looking at the phone while travelling.

2. We’ve known the mechanisms of motion sickness (looking at something static while your inner ear indicates you’re moving) from before smartphones were a thing.

3. We already have a ton of information on the phone to know when we’re in a vehicle, how fast we’re moving, direction, so on.

4. Try adding something to the static screen so it moves in tandem with you and thus reduce the cause of motion sickness.

5. Get the people who get sick to try it out.

If anything, I’m surprised it took a decade and a half to come up with it.