If it doesn't sell tens of millions it doesn't make a big impact on Apple's bottom line. It might have some other effects like incubating tech that will make it

If it doesn't sell tens of millions it doesn't make a big impact on Apple's bottom line. It might have some other effects like incubating tech that will make it into other products, but then those products become the new important products. I guess that in the maybe category then :) (I haven't used one myself).