Profit-wise, Apple claim that their digital stores only break-even, but revenue-wise, the stores dwarf the Macintosh line, with music alone matching Macs.
In 2011 it was estimated near 300 million. Now in 2013 it is alleged to be making over a billion:
Still small potatoes profit-wise, but if the share of actual revenue is that significant, than this is definitely a nice little trend for Apple. To be clear, I think the iTunes and the App store are more of an advantage/differentiator over Samsung in terms of potential (especially in the context of Apple's willingness to make bold steps in new directions). I think I came off as a little too glowing when I described Apple's digital offerings above.