"For a lot of younger audiences -- and I've asked my daughters and their friends about this -- black and white represents an unsettling lack, and not just of color. Compared to the pounding sugar shock induced by media aimed at children, old movies can seem disturbingly empty. The pace is unhurried, the action irregular, the dramatic payoff uncertain or, worse, corny and predictable. Kids thrive on knowing the rules and feeling superior to them, and entertainment corporations are slavish about catering to those interests if only to close the sale. One false move and you've lost them, literally so in the home video environment, which is the only place most kids watch old movies and from which their entire shiny lives beckon them to come away if they're bored for a nanosecond."
Ty Burr, The Best Old Movies for Families: A Guide to Watching Together