It depends on the length of the flight and time of day. For something under 2 hours I don't care much, but on a 4-5 hour flight it's fairly meaningful to me, especially if I forgot to download something to watch on my ipad. I'll say this, when booking some flights of 3+ hours in the past I've taken a 1-2 hour later/earlier flight to be on a plane with IFE (knowing that I'll usually get upgraded and be in F where it was already free).