Re: motion sickness, you'll find it almost impossible to fool millions of years of primate evolution where in order to protect the species from poisonous mushrooms, we have evolved to associate visual motion without inner ear motion as a sign of food poisoning, hence the desire to vomit. Even the US airforce with billions of dollars in their budget have given up on serious VR headsets since the trainees couldn't tolerate more than 15 minutes of VR. How can Occulus and other cheaper headsets offer something better? They cannot. VR is a passing fad (thanks evolution).