Apple's making life simpler for developers with the iPhone 3.2 Beta 3 SDK which makes it easier to develop universal apps by allowing devs to easily update "existing iPhone projects to include the necessary files to support" iPads. [Apple] Updated again.
To go along with this, Apple's going to have to prevent confusion somehow by creating a tiered app store, like an iPad only section where applications made specifically for that device can be confined to their own special site. Until now, we were all fine with the current app store because the apps were generally universal across the current and last gen iPod touch's and iPhones.
Edit: It's come to my attention that there will be an iPad-only section, so...........ok then.