I understand what you mean. There's an incredible amount of tactile information in the real world, and I can't help feeling that there's probably almost as much information flowing in as audio or visual (that we as humans can process at any one instant), but I have been unable to find anything to back up my wild hypothesis.
People have used stimulus arrays attached to the back to "replace" eyesight. It would be interesting to compare the number of nerves coming from the different senses, and how much neuronal area the senses get as the signals are aggregated.
