Charles Stross writes last week about how rapidly even our own cultures can become alien to us, and how too often that isn't reflected in future SF writing:
It's worth noting, incidentally, that much of the social change that led up to the current cultural matrix was driven by technological change. Better medicine and family planning techniques gave us the basis for a society in which we don't go to a different infant's funeral every month, in which bananas are cheaper than potatoes, people aren't worn out unto death by fifty, civil rights for people who aren't rich white males are at least recognized as theoretically desirable, and in which you probably aren't dying of tuberculosis. So why do repeatedly we see the depiction of far future societies with cheap interstellar travel in which this hasn't bought about massive social change as a side-effect (other than the trivial example of everyone having a continental sized back yard to mow)?
Worth a read, and worth absorbing for your own writing: http://www.antipope.org/charlie/blog-static/2014/12/on-the-lack-of-cultural-estran.html