I live in a large city in the UK, and throughout the past year I've only seen two iPad's. I wouldn't even remotely say that the iPad has "replaced the laptop" in any way, shape or form. When the iPhone was released it was near impossible to not see it outside, whereas the average iPad user will keep theirs at home.
Even if the figures are good I really cannot see the casual user deciding to ditch their laptop for the iPad, and I'd go as far as to say that the iPad has been a huge disappointment.