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It's not as simple as that, individuals have very different sensibilities regarding simulator sickness and lack of inertia is just one (presumed) cause of it. There are studies that suggest "virtual cockpits" or even a "virtual nose" can help here.

However, it's clear that right now everybody is trying to "play it safe" regarding movement in VR and this is quite limiting to the possible experiences. Marketing towards the segment of that population that doesn't get simulator sickness is unthinkable.