It will still sell at double or triple the i-Pad cost
It is aimed at a totally different market segment, not the consumer.
They sell FAR more expensive devices very easily, where i-Pad doesn't even make it to the consideration list.
Would you buy a $3500.00 smart phone with a $300 battery? Of course not. But they sell THOUSANDS upon THOUSANDS of them to the right marketplace, where again standard smartphones/i-Phones aren't even in for consideration.
Not everything has to appeal to the mass consumer market in order to be successful.