Search for Uzilite at DAZ
http://www.daz3d.com/i.x/search/searchsub/-/?sstring=uzilite
There are a lot of futuristic outfits at DAZ, but the store doesn't have themes. You could try searching for "science" or "scifi" to pick up those keywords if they're in descriptions, but it won't provide everything.

RDNA's store has a science fiction theme and some of the best future outfits (but not much armor).
http://www.runtimedna.com/mod/bcs/index.php?TopID=4433

The Rendo Marketplace also has a science fiction theme under Poser and I'll let you look that one up.

There are a lot of different future looks, often based on past styles. Clothing trends rarely match what was envisioned in the past. The science fiction outfits, from pulp magazines and movies, didn't match what the turn of the millennium provided.  1950s scifi thought there would be mostly body hugging shiny outfits at the turn of the millennium. Instead, we have urban grunge baggy clothing. Today, science fiction mostly sees a used, decaying look for the future. New textures on clothing items can give them a future look. 

Hair styles are somewhat timeless because there is only so much that can be done to hair without making it a high maintenance item and something that won't be kept for long. There are some high maintenance hair styles that belong to certain periods of history. Somebody could pull a medieval peasant woman and a western cowboy out of time and their hair would not be out of place today.

If you have specific looks in mind, based on movies, people could help you zero in on what you're looking for. Otherwise, browse the stores and you might find something you want.

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon