tablets are for new-prehistoric post-modern unproductive consumerist and passive people and know one thing: they will disappear soon, they are an accident in history, things are a changing...
i can see in a few years the shape and size of notepads and booklet like the courier prototype from microsoft take place of them. they are foldable, they could possibly be pocketable but large enough to watch and read, good to write on, and can be used as an old laptop or just flatted down to take notes on them without the frustrating presence of the screen as a wall between the user and the rest of the world.
smartphones let the geeks out but are not really good to work, the best compromise as of now is still the n900 for me, though nokia MUST do more for it.
the tablet is just the primitive phase of the new standard, which surely wont be a tablet.