I have been using Numbers to do some income tax stuff. It is not the most sophisticated spreadsheet program, but it does what I need. And it is not a complicated burden to do the work. But this is not about Numbers. I bought a separate Bluetooth keyboard, and gave it away because i never used it. Then I bought a Bluetooth keyboard that attached to the iPad, so it was not a separate thing to lug around. The design worked, but the keys were smaller than the keys on the iPad, and I never used it.
The point is, that the iPad design is just about right - the balance between enough and too much. I have enough stuff to remember. I don't want to become an expert at another piece of software that is more complex than a cat's nervous system. I want something that is intuitive, seamless, and not too big. The Sushi of computers, not the Haute Cuisine of computers.
So I think that is why it works. It is not too much, maybe it is just a little bit less than I need. I am back to the Apple cover and a plastic Incipio back just to keep it from banging around too much. It does just enough. I got rid of my laptop. There will be something else tomorrow. This flat screen will look obsolete in a few years. But the design will do more with less, if Apple gets it right. And if they don't, someone else will.