Tom and jerry will just stand there staring at each other because there's nothing else to do. I'm sure we'llfind it hilarious, but not at all like we did growing up with it.
Actually, in the movie supernova, the captain of the ship was doing his doctoral disertation on violence in cartoons and a notable sound clip at the start is "when cartoons were outlawed in 20xx for their violent content".
it's coming. just watch
Some cartoons like Family Guy already think long silences are hilarious long after they've outlived their humour value.