Superman was my first superhero, going back to the early 60s when I would tie a towel around my neck and jump off the furniture. When I was about 6 I found out that George Reeves was dead. Bad day.
In 1978 Christopher Reeve's effortless performance did indeed make us believe that a man could fly. Brandon Routh did a great job, but he was not Superman.
From what I've seen so far Henry Cavill looks like he can pull it off. Hopefully, Superman lives again.