A USB port for flash drives plus a file system (on board folders) would be a HUGE step away from the computer to the iPad. I sure hope this comes to pass. Granted, Dropbox is great, but it's still storing your materials on someone else's computer. The chance for compromise is always there.
The addition of iPhoto to the "i" apps has elevated the photo abilities to a new level - being able to name and access data about photos now puts the iPad closer to being used at a professional level for processing pix.