I guess I always assumed that fantasy fans also read sci-fi, but perhaps that's just how my circle of friends were. Here's an exerpt from the article link posted:
The visionary author of more than 70 books, who was nominated for a Nobel Prize after predicting the existence of satellites, was most famous for his short story "The Sentinel", which was expanded into the novel that was later adapted for Stanley Kubrick's film "2001: A Space Odyssey".
He was also credited with inventing the concept of communications satellites in 1945, decades before they became a reality.
Clarke was the last surviving member of what was sometimes known as the "Big Three" of science fiction, alongside Robert A. Heinlein and Isaac Asimov.
The astronomer Sir Patrick Moore said that his friend was a “great visionary, brilliant science-fiction writer and great forecaster”.
“He said there would be a man on the Moon by 1970, while I said 1980 — and he was right,” he said.
I read a lot of books, but usually from authors I've been told about. Like Nora Roberts, or John Grisham, I love all sorts of books, mainly love though, those based around adventure, anything that can keep my attention.
The sadness felt isn't because I think he didn't lead a fulfilling life...on the contrary, he was one of the most prolific science "fiction" writers of our time. The sadness is for those of us who were fans that will not be privy to anymore of his extraordinary works. It's selfish I know.