Each passenger should have a wall instead of the arm rests, going about 1->2 feet from the seat upwards. Sort of like sitting in a toilet stall with short walls.
After all flying is crappy anyhow
In January we flew Business Class, Singapore Airlines, IAH to Manchester, England and this is exactly what it was like except that the "wall" was a sliding panel. The seats also converted to flat beds and I slept extremely well, although when I woke up I saw that DW had put up the wall so maybe I'd been snoring