Suppose, just for the sake of argument, that all of the information on Wikipedia was in your head as instant recall. Any factoid — whether famous birthday, significant historical event, geographic location or anatomical nomenclature — as well as any scientific explanation, economic theory or notable literary quote and its associated meaning, would be right there in your head, without needing to be looked up.
What would this change? Would it mean that we work differently, play differently, socialize differently? Would we remain fundamentally the same as a social species, or would there be a radical shift of some sort?
I don’t know the answers, but I suspect that these are going to become important questions.