A non-fiction writer pretty much has the shape of the figure in front of him or her and goes about refining it. A work of non-fiction is not as difficult to write as a work of fiction, but it's not as satisfying in the end. ↗
My Mom said she learned how to swim when someone took her out in the lake and threw her off the boat. I said, 'Mom, they weren't trying to teach you how to swim.' ↗
I wanted to show a normal young girl whose only difference was that she behaved in the way a boy might, without any sense of guilt on a moral or sexual level. ↗
And in down times it shakes a lot of the bad SF out, a lot the stuff that was bought for literary reasons, which is neither entertaining nor great literature. ↗
So, I guess the answer to your question is very few people can bring off a novel of the future because it's just so damn hard to make it look like the future. ↗
Write a lot. And finish what you write. Don't join writer's clubs and go sit around having coffee reading pieces of your manuscript to people. Write it. Finish it. I set those rules up years ago, and nothing's changed. ↗