skyscraper101
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I seem to remember some people using that argument against the first iPhone. I can't be arsed to search that far back so wouldn't want to say who it was.
Major difference though. The iphone is a sturdy thing that you can vigorously wipe to your hearts content with whatever is to hand. A macbook air screen is delicate and thin and therefore I want mine coming into contact with fingers and wiping cloths as little as possible.
Also I still don't see how the trackpad which sits conveniently at your fingertips is any less preferable than a screen which you have to reach up at.