I think the WT cabin with 9 across is going to be very similar to the Emirates 777 with 10 across. In a word TIGHT ! I wonder if the pitch will be a bit more generous than the competition to make up for it.
I hope BA doesn't decide that 10 across is a good idea for the 777 after this.
Comparing with other airlines (even JAL and ANA both have only 8 abreast on the 787). Only United and Thomson (charters) has so far published a 9 across plan for the aircraft.
Also means the big "sell" of extra hand baggage space was based on 8 across, so presumably this will reduce the amount of space per person on a 9 across config.
Very disappointed.