While sentimental, images aren't everything. They record specific moments, yes. But I don't think photographs truly preserve memories in the way that we've been told, in that warm and fuzzy Hallmark card-sort of way. I might look at an image from long ago to remind myself of tangible details: the color of a shirt, the faces in the background. But in my mind, the insides of that moment have melted away: the sounds, smells, and sensations have long transformed into something else. The image is a byproduct, a shadow of a memory.
So, I like what Om says about confusing the photos on our smartphone as memories. I'm not saying that the images we take on our phones don't matter, but I don't think that having so many, tucked away in our pocket, makes us any richer.