I bet there are a great deal of people like me that don't use / purchase tables because of the poor keyboard experience. With a real keyboard I can type fast, faster than I can speak, faster than I can write using a pen. My interaction with a computer always was this way: my ideas can flow fast to the form of text, code, emails, and so forth. With the iPad I feel dumb, because I'm no longer fast enough, and I refuse this kind of interaction. However the new text editing proposed on this story fixes part of the problem, but not all unfortunately, still it's a great step forward.
Because stylus' are another thing to keep track of, easy to lose, and it's not seamless to switch between touch input and stylus. And people don't handwrite all that much faster than they can type on a virtual keyboard.
The new Samsung Note comes with a S-Pen that I believe retracts into the device. The Samsung Galaxy SII works with a stylus. Early tablets (from the 90s) came with similar pointing/writing devices.
