Marco Arment makes the point that the Mac App Store is for developers who aren’t already developing Mac apps. This was the point I was trying to get at the other day when I said:
I can see a future where a sizable percentage of Mac users only use applications that they installed through the Mac App Store.
There are a lot of people who buy Macs, go to the Apple Store and take some classes, and never bother to install anything on their Mac that wasn’t there when they bought it. Maybe they buy a productivity application so they can do word processing, and that’s it.
The App Store is a way to deliver applications to those people, and like Marco, I think it’s going to be very successful in that regard. Anyway, go read his post, The Mac App Store isn’t for today’s Mac developers.