3 more WILL matter!
Those of you who think and are saying that three more megapixels will not matter, well your wrong. It will be a decent jump in resolution, I'm a photographer and I've had years of experience with cameras and their sensors. You will be able to crop more and still have a decent photo, sure 3mp is not huge, but coming from 5 to 8 will be noticeable, approx 60% more sensor area. The optics are just as important along with the f/ratio. However when the sensor gets to a certain size (mp), you will eventually get into the law of deminishing returns in term of resolution and detail. Remember it's the quality & size of the pixels that make the image better. The iPhones lens however is tiny still, and some distant objects will not be resolved too well, unlike my Nikon D3 when used with the 85mm f/1.4G lens which delivers great resolution and clarity. But as for the cell phone camera, yeah, this will be a nice jump in quality and clarity. Especially with the new style backlit sensor, which takes in more light and color. I'm anxious to take some HDR shots with the new camera. You can see full resolution samples from this camera on Apple's website. I've looked at them on my 15-inch MacBook pro and compared the 5mp, this 8mp is much better, I noticed the difference right away.