Such a fantastic statement I don't understand how discussion can be generated but i shall try. The old ones are great I didn't like the new one due to the reason that it was too politicaly correct hence the black kid as the main character.
Well, I guess they wanted to make something new, but were to lazy to come up with the whole movie, so they used a pattern and changed just a few things...
Eh...I wouldn't advise people to see it. It's extremely predictable, and I think they relied a little too much on just the name value(Jackie Chan as Mr. Miyagi, for instance). I liked the original well enough, I suppose, but the new one not so much. Probably because all they did was add a few famous people, make the karate kid black, and send him to China instead of the karate kid being in America. Other than that, the plot was exactly the same....