IMHO digital entertainment doesn't make up for being stuck in a cramped cabin for up to 19 hours (the longest international flight) around people (with varying levels of considerateness, contagiousness, and personal hygiene). Not to mention the increased risks of DVT and radiation exposure.
I travel each year to see family abroad, a minimum 2-leg trip totaling at least 27 hours. I can't sleep on planes so I arrive exhausted and am useless and cranky for the first 2 days after this trip. I would happily pay 2x the fare to cut that trip in half.