The Oculus Rift is not just a rectangular display in front of you, it gives you the same field of vision of the human eye - that reaches almost 180 degrees. Combine this with the motion sensor to emulate human vision when you turn your head.
After capital investment of large companies started the project to transform what was a prototype (which could be purchased through a more than $ 300 donation to the project on Kickstarter) in a commercially viable device. And then started the changes, improvements launched and, guess what? SUCCESS!
The biggest problem the company still faces the Oculus Rift (or facing) is the sick feeling that many people felt (some had no problems) after prolonged use of the device. The second cause explanations of analysts, was due to absurd soaking the device causes. To put it simply, the sense of immersion is so great that your brain think you're seeing something real, just that, as the prototype still gives some lags from time to time and still can not graphically convey the feeling of fluides real world (responsible for the device say that the final version that has been almost completely corrected), the human brain is confused and hence comes the feeling of sickness and malaise. This also occurs in games in first person, it is quite common. They say that the final version had this and other outstanding issues, but never had the opportunity to test ... As I understand technology however, I am pretty sure that the device still has several bugs, and "things" that will need be improved. "Things" that will come in the second corrected version of the device, which will be better than the first (it will be repeated in version 3 and ect, but not as ridiculously as will happen from version 1 to 2). It is the same that occurs with new processor architectures, the jump from first to second version is always the biggest.