To be realistic, prejudice will never disappear in its entirety in the United States. We as a people will never be evolved enough to consider that we are of one race- the human race and we are all one according to the universe. As prejudice against one group seemingly disappear, another group is subject to prejudice depending upon the political and/or social climate at the time.
Of course, overt prejudice has somewhat disappeared. However, many prejudices are often covert. For example, a person who is considered the other by the majority society may be denied service at a restaurant, being not promoted at work, and/or be followed in a store. Of course, the reasons given for such treatment is pretextual i.e. "well the restaurant was closed at the time", " we selected a person who possess more qualifications and/or who has more educational/work experience", and/or " you cannot afford such a product". These pretextual excuses have an underlying prejudicial context based upon the person's protected class status whether it is race/color, national origin, religion, and/or related status. Yes, prejudice is alive in all its insidious covert forms.