Interesting article, the bits I scanned through.
Seems that a lot of the responses kind of point out the same thing: that 'science fiction' - especially good/awarded/critically-acclaimed/popular scifi - isn't really about the future but about the present, in that they typically take today's issues and put them in a fictional environment that allows them to be examined.
Basically as my list of read books slowly increases, either scifi or fantasy, these are the patterns that I've observed. Certainly not every book is explicitly or implicitly trying to conquer a particular issue, but a lot of them do. Take a look at the list of 25 or so books that have won both the hugo and nebula award. Many argue that winning both is the highest praise a scifi book can achieve - because Hugo is awarded by a panel of 'experts' and Nebula is awarded by popular vote - and if you've read any or all of them you'll see what I mean. They are good books, some with better writing than others, but most seem to have a 'present day' (at time of writing) issue at their core, which is probably what made them so compelling to both 'experts' and popular among 'the people'.