Back in the day people were limited even in what they imagined they could bring with them to a desert island - a tiny fraction of their most beloved music and literature made it to the list.
In the future, we should be able carry every last thing we read, heard and watched in our lives in our souped-up cell phones. Armed with a cellular and a hand-crank cell phone charger one could in theory be as connected on the island as in the biggest metropolis while food was at hand.
Desert islands of the future will obviate the need for selectivity, we will likely be less consumed by thoughts of that one book or one piece of music that we can't live without. In that things of the most spectacular beauty will appear less so in our eyes - they would just mingle with mediocrity to form a larger aggregate of pleasantness.