In this demo of the software, there is no flashlight button in the Control Center, so that doesn't help to answer whether or not the next-gen iPads will have rear flashes. In general, the video from Rozetked doesn't have a lot in there. The OS runs relatively smoothly, and the animations look nice. But, the software is buggy as expected, and actually has a force restart when attempting to open the Settings app.
Although that force restart was fairly interesting in itself, because it seemed to us that iOS 7 was much faster to boot up than previous versions of the software. Maybe we're just looking for something to find in the video though.