I read that Thomas Cook, from it's first iteration, was 178 years old. Very few companies survive 100 years. The change in society and demands just make it so hard for comapnies - in ANY sector - to continue.
The online booking systems will profit a ittle more but one of the big changes is the change in the people making the bookings. People growing up with the Internet, if their parents/grand parents always used TCX, now their children will make the bookings online for them.