Of course 'exhausted' doesn't only mean depleted. Scifi should take a nice long holiday and come back relaxed and refreshed to embark on some new direction
The point made in the second part about trying to shovel in every scifi trope the author can think of really hit me with the new aliens film Prometheus. It just tried to do too many things and so did none of them well. Was Alien ever even science fiction? Perhaps it was so great (IMO) because it pushed the boundaries of both scifi and horror
I think Paul Kincaid is wrong to say science fiction shouldn't be about escapism in the way fantasy is, because actually it's always been escapism. Otherwise scifi would be a very narrow genre of fiction by scientists for scientists, and wouldn't appeal to anyone else (this can be argued for hard SF regardless).
Ultimately, really great fiction gives you an insight into human nature. The genre is just the wrapper. That's why non-scientists are able to enjoy science fiction, and it probably part explains the staleness of the genre
Science fiction is no longer being written nor read by scientists, so the genre has evolved into fantasy set in the future
The other half of it is that back in the 60's, we were sold a dream of spaceflight and mankind colonising the stars. What we got instead was something no less fundamentally radical: the internet.
However, it has crept up on us slowly. Not suddenly and dramatically. There was no fanfare when the first google search was made or wikipedia article written in the way there was with the first footsteps on the moon.
So we take it for granted. We live in a world of technological marvels, and we take it that they will just keep improving and that by and large, we don't need to know how they work. Nor do we want to know their limitations, just how next year's smartphone will be better.
That same thinking translates into attitudes towards spaceships. You don't have to be a geek to operate one, and in fact, the most interesting aspects of them are not the tech behind them, but the social implications