...it would be the ability to flip between apps without returning to the homescreen. Today I was watching Cloverfield and got a text. I hit "Reply" which pulled up the keyboard. Once I'd sent the text, I had to return to the homepage, access the iPod and find my film. Not a particularly arduous task I admit, but when I'm having a text conversation, I want it to automatically restart my movie where I left off.
I bet you all really wanted to know that. Now it's time for food. Later!