What's so amazing about it? Well it overturns centuries of thought about how knowledge is disseminated, that's what. In the past knowledge was the preserve of a small elite. Until a little over a century ago most of the world was illiterate and even with mass literacy in the 20th century 99.999% of people consumed knowledge but didn't generate it. Whereas Wikipedia is not only available to everyone but it's created by everyone.
So consistent with that theme, yesterday I made my first edit. You can see it here. The sentence on amending the Australian Constitution is my work.