... I own an iPhone (and an iPod and an iMac) but would love a bigger screen and the Samsung delivers on that. It's a funny commercial. +1 to Samsung there.
Can you explain why you want a bigger screen? I see a lot of supposed Apple users that keep saying they want bigger screens, and I can't for the life of me figure out why you would want the apps to look stretched and less sharp from the required drop in DPI a bigger screen would introduce.
The only thing that a bigger screen on a pixel perfect UI would benefit is a slightly higher res for video playback. Do you watch that much video on your phone that you would be willing to sacrifice the entire UI experience just to have a bigger screen?
I'm not an Apple fanboy and I certainly do not think that Apple can do no wrong, but the 3.5" screen is absolutely perfect for me. I can use my phone with one hand, I can hold my phone without my palm interfering with multi-touch scenarios, and my phone fits very, very comfortably in my pocket. A bigger screen would negate all of that.