In the next round of rumors for the upcoming iPhone we have a few interesting bits of information that may or may not be truth. We already know about the video camera, extra RAM, more horsepower and now the rumor of an OLED screen and backlit Apple logo.
The OLED definitely could be possible and would provide for a brighter screen that consumes less power and takes up less room. The technology is a little pricey though and that could factor into it being included.
The backlit Apple logo could work off the OLED screen or just off the normal backlight.
Either way we will see some sort of updates and we could continue to speculate over and over. Only Apple can show us the actual product.