I think we are being naive if we think there will still be the option for a free G&T in ET once BOB is introduced. I would have thought this will be the the first thing to go.
There will probably be free tea,coffee,soft drinks and the option to buy alcohol.
I am also very interested how far they are willing to take this on long haul routes, let's hope not as far as airlines like Icelandair where you have to purchase all food and drink on TATL flights!