So right now Prince George is just Prince George, but once William becomes King, then George will automatically become the Duke of Cornwall and Cambridge? Will the Cambridge title ever revert back to the crown or will it continue to be passed down?
William’s wedding day titles are inherited through his male line until such time where the title holder becomes sovereign at which point they merge with the crown.
The heir titles Cornwall, Rothesay, etc are held by the monarch’s eldest son and heir. So like William, George will automatically get those when William becomes king.
Things get complicated should the younger folks predecease the older ones but we won’t go there now.