I know that in many countries we (I am french) are not used to travel by train - If you are not convinced that it is a good way to travel in Switzerland, have a look to this video which I am sure will make you change your mind.

Beautiful landscapes is to my opinon a first very good reason to take the train, the second reason would be that Switzerland is one of the heaviest railway network in the world so you can go almost everywhere, the third reason is that it is ecologic and the last reason is that trains are on time !!!!  

When I sell conferences and incentives, many people tell me that 1 hour from the geneva airport to too much. However it is often much longer to go from Paris or London airport to the centre. Moreover if you take a train, it is not a transfer but aready an excursion as you can enjoy the Lake, the mountains, wineyards, etc....  

Do not hesitate to share your experience in your comment section to convince car drivers.