In the eighteenth century, it was ladies and gentlemen and swings in a garden; today, it may be Campbell's soup cans or highway signs. There is no real difference. The artist still takes his everyday world and tries to make something out of it.
Take an exhibit, in the days when we saw the Pop art - Andy Warhol and all that - tomato soup cans, etc., and coming home, you saw everything like A. Warhol.