I am a computer programmer and spend almost all my waking hours at the keyboard. In the past, when I had to look up some information related to programming, examples, definitions, formulas and ex cetera I had to search endless web sites in endless different formats and usually had to piece together what I needed from different resources.
I have noticed that lately almost all the references I need end up coming from Wikipedia. It seems Wikipedia has crossed some threshold of information content and things relevant to me and my job are now mostly found here.
Way to go Wikipedia!