It certainly does. However, if you're even moderately tall, it's impossible to use the trackpad without elbowing the person next to you in the ribs, since the front of the laptop is basically touching your stomach once you open the laptop at enough of an angle to be able to see its display. (This is on a 13" MBA.)

If all you're doing is watching video then it's fine. But trying to get real work done is incredibly awkward. The only way I'm able to do anything is to use a separate Bluetooth keyboard I hold underneath the tray over my knees. But that means exclusively writing or other things I can do solely with the keyboard, without a mouse/trackpad.

Also, forget it if the person in front of you reclines. It's game over.