When first viewing the Eggleston image in the OP my focus went directly to the tablecloth. It did infuse the image with a nostalgia feel for me which reduced its banality. But, how about for a viewer who wasn't born in the same era as we were? The millennial doesn't have that nostalgia to fall back on for the image to transcend banality; an image both banal and non-banal at the same time. A Schrödinger dilemma.
Conversely, the millennial's cellphone image has none of the history which can evoke a nostalgic reaction. Though a series of 20 out of focus images representing 3.2 seconds of a night out and posted to F-Book probably secures the definition of banal.