We have many senses. To make us feel an alternative reality is real, we need to involve these senses to fool the brain. Most VR systems make use of two: sight and sound; touch is also used but not in a full reach-out-and-touch-someone sense (although people are working on it!).
Tor Nørretranders compiled data about the senses and their relative bandwidth, in computer terms. This is a bit like comparing apples and motor oil, although useful to see how it applies to VR.
So, we can see if we make you see something that is virtually real, we may be able to convince the brain it is real. Yet, simply putting ...
