"Completely ignorance"??
BTW, just because something sells good, does not make it useful. I guess you consider the lady gaga album as useful 
How narrow-minded. It's complete ignorance to call a product that will sell between 25-35 million units next year useless, especially when you haven't used one (maybe apart from playing with it at the store for a few minutes).
As I said, the iPad has replaced my $1,799 MBA and it's less than half the price, half the weight, and double the battery life.
Some of the criticisms are ridiculous. Heavy video editing and high-end windows gaming? Have fun trying to do these things on ANY notebook, regardless of price.