>>people (inclduing me) will get sick from it is my big concern

Sick doesn't mean cancer or tuberclosis.

I remember from my childhood watching TV was considered bad, because it was thought to be bad fore one's eyes. Ear phones were bad for the ears and reading on the smart phone in a bus makes me motion sick to date.

Like everything there is a middle ground.

I was one of the developers on the original Doom and got so sick from playing it that it motivated me to debug my code faster. The phases were no problemo, sweating, farting, nausea, then that was it: gotta lie down and hug the cold, firm floor.

I eventually became less sensitive to it. I imagine the same will happen with VR after we get our "VR legs".

Oh, i did. Not enough to keep me from playing, but when it hit, it hit hard. Hard enough that i still get minor flashbacks even from screenshots. Surprisingly, the first game where i did not have that problem was, of all things, Descent. Must have been something specific about the movement and/or projection.

People getting nauseous from first person games was and still is fairly common.