You forgot to tell us how long the battery lasts, or how easy it is to rotate the screen into portrait mode to read with, or how much it weighs
3lbs, 1.2" 'thin', LED back lit. Battery life is 6hrs with most media although I have gotten over 8 with just typing away in Word.
So it is heavier, but has a Keyboard and a ton of extra features/performance. Not saying they are equal competitors, only that if this was the convertible version (soon to be released) or, better, had a rotating screen, the iPad would have nothing of interest to me. But I don't believe I am the target audiance by any means. When I read (I scan my own books with a book scanner) I take a lot of notes in Zotero with the intent of academic writing.