Photos & Images - Mashups

I really thought that Photos and Images was going to be a 'Revelation' to me. Instead I felt confused and yes, even a little cheated!! Rather than panic, I have decided to spend a little more time on the subject just to see if 'illumination' dawns. I think the crux of the matter lies in the fact that I cannot think of a reason why I would need to use any of them ... and until that 'epiphany' occurs and I rush to create that 'magic & original' effect, I am stuck looking glumly at the various possibilities with no viable end creation in sight.