While I enjoyed the both Richard Donner Superman movies, and I can appreciate Superman Returns for what it tried to do, I feel that it was necessary to reboot the series if they ever planned on bringing Superman back to the big screen. A franchise can only go on so long before it needs to be re-invented in some way. It gives the writers and filmmakers flexibility with characters and plots because they don't have a string of movies already existing that dictate things that need to have happen.
I'm looking forward to the movie, and my first hub I ever wrote on here was about it, where I gave some of my opinions on the movie in comparison to the 1979 Superman. I'm curious to see how well I can accept Cavill as Superman, because, unlike Reeve and Routh, he's not an unknown actor. He's not someone that everyone knows and can instantly recognize, but he still has a decent following to him, and I personally feel that such a thing hurts an actor trying to play a superhero. It makes it harder to see the actor as the superhero because you recognize him from being in other things. With Reeve, I didn't see him as an actor playing Superman. I saw him AS Superman, because until that first movie, I'd never seen him before, and he was able to sell it well partially because of that. With Cavill, because of his notoriety, he needs to be able to sell the character even better than Reeve did in order for it to work in my opinion.
I really hope it does work though and that the movie does well, because I get the feeling that, if it doesn't, DC would likely resign to only making Batman movies, fearing that any attempt to bring another of their pantheon to the big screen would fail.