We decided last minute to take a vacation to Hong Kong to visit my family. I was dreading the 15 hour flight but it wasn't too bad. My daughter slept for 1 hour in the beginning, was awake for 6 hours, then slept another 1 hour, was awake for 4 hours, then slept the rest of the 3 hours. My son slept about 6 hours on the floor. I was able to watch some movies: Something Borrowed (okay), Kung Fu Panda 2 (okay but only watched 20 minutes), Midnight in Paris (bad), Fast Five (good), X-Men (good).
The food on Air Canada was gross but we were able to manage the space situation by ordering special meals for me and my son so our meals came before the regular meal service. That meant when my food came, my husband was able to carry our daughter and vice versa. It worked out much better than last time when we traveled with my 11-month old son and both our meals came at the same time but one of us was not able to eat because there was not enough space for 2 trays of food and holding the baby.