needs to be an OS wide feature. Apple could encourage devs to implement this. Some games already do!
$12.00 accessory most likely a new iPod Shuffle connector
$99 MD564ZM/A would likely be a new (USB3?)Super Drive
The $35 adapter would be a new (USB 3.0 Gigabit?) Ethernet adapter
This won't make the problem any better by adding iPad too
from the pictures and videos seen, we are expecting a considerably slimmer iPhone
How will they announce for iOS, it's a bigger screen without giving it away the iPhone will have a bigger screen? And reasons the extra screen won't just be for a 'Tray'
apps would still get the same 960 × 640 screen area, and the switching dock (the thing you see when you double-press the home button) would be on screen all the time.
I say no way.
First, this would be antithetical to the iOS aesthetic. iOS apps get the whole display, minus only (and optionally!) the status bar. When you launch an app, the device, conceptually, is the app. A persistent app dock would ruin that.
Second, practically, this would be a disaster. An erroneous tap on the icons in the dock would instantly zap you out of the current app. Think about where it would be — right under the keyboard. Miss the space bar by a few pixels and pop — you’re zapped to another app, mid-sentence. I’ve experienced this problem firsthand with Android phones with soft keys underneath the display. It’s a usability disaster.
Third, making the switching dock a persistent on-screen element would solve no problem. Needing to double-press the home button to invoke it is not a hardship.
The unlocking thing could be useful in certain situations. But Siri generally has to have an API to ever be successful.
Summary of all the WWDC ideas