Large bubbles of artificial magnetic fields supposedly around Mars expedition spacecraft and plasma windows? Fair enough. 100 years from now it's going to be very different and, in hindsight, such types of shields will probably seem patently obvious part of life.
But is why I often chuckle reading old stories where magnetic tape (it's not like it isn't any good, it just sooks at random access) and vaccuum tubes are still the cornerstone of information technology. Now it seems but funny. However, when predictions *are* made regarding new and evolved technologies - I'm sorry - pure technobabble starts.
Now why did I mention tape - evolution of all things invented is limited both in use and in its own brickwall limits, whichever comes first then. In the history of mankind we've had numerous breakthroughs, designs that have changed the course, but after some time all replaced by something different, previously unimaginable. Consider the old good transistor (and semi-conductor fabrication in general) - it's domination just might soon be over as we hit the physical wall. Rarely anybody knows what's behind that wall, it's just guesses and technobabble - photonics, optronics and whatnot. It's increasingly improbable to imagine that future technologies will be based on any of the concepts that are so ubiquitous now.
And that's why I'm against calling it sci-fi. There's soft sci-fi (majority of it, really, because actual science methodically disproves many a hard sci-fi as it progresses) and then there's nothing but space fantasy.
Most of the stuff is technobabble. Unfortunately, that includes shields.
I'm not saying it's not enjoyable, regardless of the amount of sod involved, and certainly not that one should not indulge into researching reasonable explanations for these things. But I'm heavily disillusioned that despite our advances we've gone nowhere fast and that sort of makes a bit of luddite.