I'm with Globaliser. At least fifty percent of my long haul flights are overnight and I want to sleep. Fabric seats are not as slippy, so it's easier to get some kip.
I can bring my own entertainment, booze, reading matter and such on the flight but I'm stuck with the seat that the airline provide. On balance, I'd rather they put as much effort as possible into making that comfy. If I really wanted champagne, I'd buy it.
That being said, I do like a good selection of videos to watch. Air France have taken to oly changing about a third of their films each month and I've now seen all of the ones they are currently showing. Going to be a long flight tomorrow!