The fact is that computers aren't made for humans. Computers are just made, and humans have to adjust to them.
The problem is that most people that are not into technology just don't understand how computers work. Should I single click of double click? Click left or right?
The only people that can work with some ease on computers are people with a more than average interest in technology. Ordinary people often have to fight great battles to get the job done. The therm 'ordinary' does not justice to these people, because technologists seem to forget that they are the people that actually do something useful.
The iPad is the first personal computer that is actually made for humans that do not have a primary interest in computers. The entire computer is abstracted away to focus on the things you really want to do. People do not need the help of technologists anymore to do the things they want.
The iPhone was the first in this new kind of computers, but due to it's size it's still a bit of a gimmick. But it was a revolution within the world of smart phones. It was the first device that was actually usable for non- technologists. And the iPad will be the first 'regular' computer that (hopefully) won't be such a nuisance as current home computers are.