This seems to be the "upward mobility" version of the American dream. Not the white fence+wife+dog one.
#3 and the Carlin quote from #2 probably make a good point: http://www.urbandictionary.com/define.php?term=american%20dr...
Today, we have a different setting: The American dream is hold on, to appease the masses of people that never have any chance to get in reach of the American dream at all.