Some things just have to go by air.
When your assembly line is halted through lack of a spare part or a vital component for the end product, costs can run into $1000s per hour.
When the tuna has to fresh for the sushi.
When the customer wants in NOW. On a $2000 laptop a couple of extra $s fuel surcharge means nothing.
Will the type of freight change ? Sure it will be really high value and time sensitive.
Will the type of aircraft flying it change ? Sure look at the aircraft on the cargo aprons at major Asian airports B744, B777, B757, MD11. Not so many B742, B727 around now, havent seen a re-engined DC8 in ages let alone one with JT3Ds.