JJFlyer
Thanks for including the Bristol Brabazon (my doppelganger) in your post.
As big as a modern 747, the Brabazon was designed to carry only 100 passengers in Imperial Airways style luxury non-stop across the Atlantic, unfortunately by the time it flew in 1949 - there were many Constellations etc able to do it cheaper with stops also the Comet was about to enter service, even if that ended in the fatal crashes of 1953.
I'm sure the A380 will be a success, but it's certainly not an easy time for airlines or manufacturers at the moment.