I just returned from a long trip and tried a couple of different pillow alternatives because showing in planes is so uncomfortable.
Get over of these… it doubles as an eye mask and head support so you can sleep without linking your neck. SO much better than a pillow.
https://www.amazon.com/ORIGINAL-SeatSleeper-Travel-Support-Pillow/dp/B0758TY861/ref=mp_s_a_1_1_sspa
Every plane I’ve been on with screens over the past 2-3 years had a sliding headrest that gives you something to attach to that doesn’t interfere with the person behind you. It’s a good thing to be aware of, but I haven’t seen it be an issue at all.