Obsolescencia. ¿Golpe mental?

http://www.youtube.com/watch?v=ugiJz_HXXIg&feature=related

http://www.youtube.com/watch?v=5WjuKIjmGvU&feature=related&noredirect=1

http://www.youtube.com/watch?v=FMpCiWvPvxY&feature=related

http://www.youtube.com/watch?v=o1V-pfXP7iU&feature=related