What SF author or fan isn't interested in human space travel? I've yet to meet one.
I'm a physicist and computer scientist by training. I worked in high tech for thirty years as everything from engineer to senior vice president - for many of those years, writing SF as a hobby - until, in 2004, I began writing full time.
What kind of hard SF do I write? Everything from near-future, Earth-centric techno-thrillers to far-future, far-flung interstellar epics.
I have to believe SF writers will continue to inspire the public to have faith in - to demand! - a future that is at least as big and bold as the past.
Many a fine SF story uses science or technology merely as backdrop. Many a fine SF story presumes a technological breakthrough and explores its implications without attempting to predict how the thing might actual work.