Armchair quarterbacks always like to take up either the pro or con side of potential new trends and products. They all operate on blind speculation and random presumptions based on their own limited views (or fanboyisms).
Apple may or may not release a tablet-type device. It may or may not be a PC or an uber-iPod touch. It may succeed or fail. NOBODY KNOWS.
I could see many legitimate uses for a good tablet-type device (and I'm not talking about the lame JooJoo Crunchpad).
At one time it seemed outlandish that there would be a PC in every home, or that people would have more than 1 TV and so on.
I'll wait until it ships (if ever) before casting a judgment.
I remember the 'newton', and the tablet is suspiciously close to a modernized newton.