The mistake some of you are making is in extrapolating future results from current data. It won't be iPad 1.0 that will be selling 100 million units. It will be 2.0, 3.0, etc.
What will the price point be in two years? No idea.
How many models in the iPad family will there be in two years? No idea.
Remember the original 2001 iPod and how much it cost and what it could do? Compare it to the iPod touch and you'll get an idea of what the 2020 version of the iPad could be like. Use your imagination and you'll see how huge the iPad is going to be.
What will the price point be in two years? No idea.
How many models in the iPad family will there be in two years? No idea.
Remember the original 2001 iPod and how much it cost and what it could do? Compare it to the iPod touch and you'll get an idea of what the 2020 version of the iPad could be like. Use your imagination and you'll see how huge the iPad is going to be.