Airbus has promised clearer legroom, bigger overhead storage bins and onboard wireless in its forthcoming A330neo.
In addition, redesigned galley and lavatory areas will allow airlines to increase seat pitch from standard A330 cabins or fit 10 extra seats.
The changes are part of the manufacturer's new cabin brand "Airspace by Airbus".
In the A330neo, with which the brand will be launched, this also includes fourth-generation, high-definition IFE throughout the aircraft and underseat electronic boxes which eliminate legroom obstructions.
More main-deck space will be freed up for passengers by the relocation of the crew rest area to the lower deck, while overhead lockers will be two-thirds larger.
Other changes from current-generation A330s include: an intranet portal with streaming capability; ambient LED lighting and grip rails; customisable entrance areas; redesigned magazine racks, ventilation grilles and window bezels; and upgraded lavatory interiors.