As the new A4 CPU is rumored to be the next CPU for the 4th generation of iPhones, MobileCrunch ^[1] proposes four more features to transfer from iPad to iPhone:

1. Bluetooth Keyboard Support.

Apple iPad is claimed to support Bluetooth 2.1 + EDR that lets you connect Apple Wireless Keyboard, wireless headphones or other devices. This feature isn't supported yet in iPhones.

2. Desktop file syncing for third party applications

Now iPad allows you to drag-and-drop files from computer to the storage folders of third party applications. At one moment you're editing your document on a Mac, and at the second you're viewing it on your iPad.

3. Apps identify themselves as supporting their specific file types.

On the iPhone even if you have installed a specific application, you will need to find a way to get that file into the application's storage space. On the iPad you can open a file from the desktop or even from an email.

4. PDF Creation Support

There was always a problem of saving files that other people need to see in the friendly format. New iPad has built-in PDF creation functionality for iWork, which is very convenient.

With this improvements iPad can obviously be considered as a sign of innovations to come for the iPhone.