How many songs have they sold at a 30% cut from the music store again? I can't find anything right now to back this up, but my gut feeling is that they make a _lot_ of money from the software side, and they're going to keep pushing that because there's a lot more profit and (again, I suspect) lower costs.
If I find some numbers to back this up then I'll post them...
Edit: http://www.betanews.com/joewilcox/article/Apple-Q3-2009-by-t... (Q3 2009) shows $958m from Music and $528m from software, services. This isn't as much as from hardware totalled, but those numbers and the iPhone numbers are the only ones with growth. They're going to keep growing as they put more hardware out which can buy music, videos, apps etc from their stores.
They're a hardware company--that's where they make their money.