I would say that it's moved in both directions. Super-slick, graphic intensive apps (e.g. AAA video games) can require hundreds of people and millions of dollars. On the other hand, the App Store provides a somewhat more level playing field with regards to marketing and distribution. A developer could make an app, submit it to Apple and have millions of downloads. There is no need for marketing, a website, servers, etc.
3/5/10 at 3:18pm