I pretty much only use it on international flights, especially in coach ... there are generally a few movies I wanted to see but missed on it ... and the older movies are nice. I did a James Bond marathon on a flight to HKG earlier this year. On long flights it is nice to not have anything on my lap if I want to take a nap/not having my charging cable tangled, having the tray free for meals and drinks
Domestic flights, I just load my tablet