If the event is on September 10th, it will only be for the unveiling of the iPhone 5S and 5C models and iOS 7.0. In fact, I expect no events for the new MacBook Pro models using the Intel Haswell CPU technology (they'll roll out in early October), but there will be a media event in mid October to unveil the 5G iPad, the 2G iPad mini, the new iMac and Mac mini models with MacOS X 10.9 ("Mavericks") preloaded, and a ship date for the new Mac Pro.