On planes with seatback TVs in coach, many passengers have complained that the accompanying equipment box, usually located under the seat, significantly restricts legroom. Does anyone know if there are plans to install systems which don't need the box in that location? Are there any systems like that available? Some planes have the box located only at the aisle seats, while others have the box under every seat. I know that each box basically holds everything needed for the TVs to work, but I'm wondering if there's another place that the box can be located to increase underseat storage (which be significant given that carry-ons are getting larger due to checked-baggage fees).