It is a shame to see/hear the BA 747 interiors (atleast in World Traveller) are now becoming in such a worn out state. I know BA currently have no plans to upgrade or refit this area of the 747 aircraft, although they are apparently giving many a light spruce up and deep clean over the next few months.
BA are however investing heavily in improving the interior of many of their other long-haul aircraft. Hopefully they will realise that giving a more standard product offering across the entire fleet is the way forward.
777:
The improvements that are planned for a large part of the fleet are to match those of the newer 777-300ER cabins. These include, new Recaro seats in World Traveller and World Traveller Plus. All cabins will receive upgraded Thales Inflight Entertainment systems each with larger seat back/individual screens. This update is currently only planned for the GE-powered 777-200 aircraft that do not have the standard AVOD IFE system which can found on some of the GE-fleet and all of the RR-powered 777-200 and 747 aircraft.
While I understand the decision not to upgrade the 747 fleet with the new seating and IFE systems, (as these will slowly start to be phased out in the near future) Hopefully the remainder of the 777 fleet will soon be scheduled to follow, so to offer a standardised product on this fleet.
767:
This fleet is also currently experiencing a cabin refresh. Both the Long-haul and short-haul configured aircraft will receive updated overhead lockers and new lighting. New seat covers will be fitted throughout all classes and the Club World seating will be reupholstered to match the look across the rest of the fleet.
Another area in which BA are investing with their Long-haul fleet is with the introduction of brand new aircraft. The 787 and A380 aircraft is also expected to have the same seating and entertainment systems that are now being fitted to the above refreshed 777 aircraft.