I think it's really going to come down to three things. First you need great quality games to push a revolutionary vision such as this. If the content is good enough then the device will very likely be successful. No one wants a product where the software to support it provides a poor experience. The customer must be satisfied with the content to feel it is worth the investment. Secondly the quality and comfort of the device is also a very important factor. Does it fit the face and head properly? Is it loose and falling off? Is the depth field pleasing to the eye? Is it causing eye strain? Factors like his will highly depend on it's success as the consumers need to be comfortable with their experience. Last but not least there lies the following issues. The platform of choice, price and affordability, and accessibility all which are vital details that each of the competitors must negotiate on internally. The VR headset will not sell well if it is out of the mainstream budget range. It also need to be easily accessible for all of its user base or people won't find it a worthy investment. Also the platform of choice will be very important, this is where the PlayStation brand will have a huge advantage over its competitors as long as it's quality is comparable. I would imagine that PC versions would require some powerful hardware that the average joe would not have. It will be more or less marketed towards the master race rather than the average PC user.
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