As opposed to all that open source stuff for free in the repositories, yes. But paying for
software is something that has meanwhile been superseded by people paying for
services, and that's where the real money is in the long run.
Someone paying $10 for your software is great but not as great as someone paying $4.95 monthly for the use of a service.
The difference is that if you intend to hold on to your userbase on a subscription basis that fart apps are not going to cut it (pun intended), you will have to deliver value for the money your subscribers pay you.
Apple has not conditioned people to pay for software any more than google has conditioned people to click on ads, both companies simply used their economies of scale to make it worthwhile to market to their particular audience, google through their adwords (not adsense!) program and apple through their app store.
Just wait for the 'facebook phone' and it's associated app store, it's only a matter of time.
It's not as though Steve Jobs invented 'software for sale' with the app store, software has been sold to individuals and businesses alike for decades now, the things that have changed the equation here are:
- download sites for PC software
- open source
- massive piracy