I belive it's not a question of it being better or worse, it's a question of preserving the original films. Let's say that MGM decided to "computer-colorize" the first scenes in Wizard of Oz, now, wouldn't it be horrible? Yet, for some reason, some people would like it... Now let's say they also add some CGI to the film, and replace the tin man with a CGI character voiced by Tom Hanks. See what I mean?