We mentioned that Apple didn't really make any cosmetic changes to the phone, but that's not entirely accurate. While the 480 x 320 display on the iPhone 3GS is technically identical to its predecessor's screen, it adds one small feature which should make some users extremely happy.

The company has changed the treatment on the surface of the touchscreen, utilizing an oleophobic coating -- essentially a protectant that's highly resistant to fingerprint smudging. For those of you constantly wiping burger grease, WD40, and various other toxic materials from your iPhone, this will come as a tremendous little perk. The most surprising thing about the tech is that it actually does what the company says it will: namely, it resists new smudges and wipes almost entirely clean with a single swipe on a pant leg. This wasn't exactly the most pressing issue we had with the phone, but it's nice to know that Apple is innovating in the dirty screen space.

Camera

A camera tweak is a big deal for iPhone fans -- after all, they've had to suffer through not one, but two iterations of a phone with a paltry 2 megapixel camera, no autofocus, and no flash. Apple has tweaked two out of three here, and as Meat Loaf tells us, that ain't bad. The 3GS upgrades the built-in camera to a 3 megapixel version -- not insanely great, but at least competitive -- and has added an autofocus function with a nifty software tie-in. Instead of having to use a gross physical button to snap your shots, the iPhone continues to rely on its onscreen trigger, but cranks up the use of that big display by allowing you to focus in on subjects based on where you tap. In our experience, the parlor trick actually turned out to be quite useful, accurately zeroing in on what we wanted most of the time. Struggles to focus were minor at best, though you won't be able to do any heavy macro work here, and during video recording you're stuck with a constantly focusing lens -- no tapping allowed.