We have come pretty far since 1951 with all the technolgy that we have thats why people remade movies because we can add more things like Better special effects and better camera postions. And then when the christmas carol were just coming out they didn't have all this techonlogy like an imax threater they probably had 3d but it isn't up to date like it is now.
In past versions of the Christmas Carol they couldn't animate famous actors into movies. They had to settle for what they could do. Now a days we have technology to be able to animate people like Jim Carey into the movies. So that's why movies that get remade do so good because were able to do more.
The good thing about them remaking the movie is that they didn't change the the storyline. Usually when people remake movies that were made alot they change the storyline or tweek it a little bit. In this remake the only thing they changed or made better was the special effects and the characters.
