I think everyone can agree that artificial locomotion can be motion sickness-inducing. Which you can quite easily do a lot in Google Earths. The faster the worse.
Incidentally Google Earth has comfort options exactly due to that reason, such as the option to narrow the field of view when moving around. I wonder if that option was enabled?
No, it varies hugely person to person. Plenty of us can do completely disconnected motion in VR and not get any nausea. I could do barrel rolls and "Sliding" movement in VR no problem from day one. For the people who are marginal, software and framerate improvements can help, but those "comfort" settings work by killing immersion. There's also a small portion of people that will never be able to play VR without nausea.
Incidentally Google Earth has comfort options exactly due to that reason, such as the option to narrow the field of view when moving around. I wonder if that option was enabled?