It's called "Raid the Larder" in BA Club World - no ice dispensers or soda machines though
I don't see this coming to economy any time soon.
Qantas has a snack bar on it's long haul economy flights.
I enjoyed the 'raid the larder' although I don't think it was called that last time I used it - I seemed to be the only person awake in economy, so sat chatting with the FAs in the galley and taking the egg sandwiches out of the packs!