James B. Stewart, writing for the NYT:
If Apple’s share price grew even 20 percent a year for the next
decade, which is far below its current blistering pace, its $500
billion market capitalization would be more than $3 trillion by
2022. That is bigger than the 2011 gross domestic product of
France or Brazil.
Put another way, to increase its revenue by 20 percent, Apple has
to generate additional sales of more than $9 billion in its next
fourth quarter. A company with only $1 billion in sales has to
come up with just another $200 million.