Currently, all Android Market browsing and transactions are done through an application that comes with the phone. This mobile application used to be pretty bad (it didn’t even offer screenshots of the apps), but was finally overhauled in September to be more competitive with the iPhone’s mobile version of the App Store. The new version is a big improvement, but browsing the store from the phone isn’t exactly a good time — you can only see a few apps at once, so scrolling through various lists gets tedious.
Contrast that with the App Store that’s integrated into Apple’s iTunes. Using iTunes to download new applications isn’t just something people do when they need an app to accomplish a certain task. It’s something they do for fun. Clicking through various top apps exposes plenty of high quality games, apps from popular sites like Yelp, and even the occasional productivity tool. It’s all very fast too — you can easily download fifteen new apps in a single browsing session without breaking a sweat.