While Apple's iTunes App Store for iPhone and iPad has improved in countless ways since its introduction in 2008 -- including the recent reversal of the cross-compiler ban and the publication of the app review guidelines -- several major problems persist for both develops and users, especially the lack of trial apps, paid upgrades, and subscriptions. While the mobile app ecosystem is the new frontier and arguments can be made about how closely guarded it needs to be, Apple is about to bring the App Store concept "Back to the Mac". That's an environment where developers and users are not only accustomed to, but expect features like trials and upgrades.
So while we're all still waiting on iOS 4.2, I'm going to leap ahead a little and start thinking about what I want in iOS 5. There's lots to cover, notifications, glance-able data, profiles, NFC, etc. Right now, I'm going to focus on the App Store, and whether Apple takes the opportunity to bring some of the Mac back to the iPhone and iPad.