Thats Boeing spin, theyve reduced the cruising cabin altitude (ie what you breathe) in comparison with the 777. Theyve only reduced it to what it is in the 747 (and most of the previous generation of aircraft) already.

I think theyve done some stuff with lighting too, but really its a tube with seats in like every other aircraft. The flight decks cool though, so I may have to have a go.