Seat width will go from 17.2" to 16.8" in the new cabin. Spacious? Comfier?
So they shave 1cm off each seat. Might just be me being picky, but would that really save much Fuel burn. Could see each seat maybe saving about 1kg each each so x 189 = upto 189kgs / around 400lb. All it takes is a few extra large passengers to undo all the hard work (assuming they could sit in the new seat in the first place