Tablets have been out for forever, and some of them have even been well made only to be ABANDONED by the makers.
It's been blisteringly obvious for a decade that tablets are the future of mobile computing.
The real lesson here is that marketing and sales matter. Apple, as a company, rarely invents new things. Rather it executes on old ideas that other companies failed to execute on.
Apple connects the market to the innovative technology and that is what really pays. Inventing stuff is useless if the public doesn't understand.
Moral: Steal a good idea, make it really easy to use, and don't skimp on your sales pitch.