Science fiction campaigns

It seems like the science fiction (SF) genre of RPG offers an aspiring GM more options for creating a campaign than the typical fantasy RPG.  A typical SF universe offers advanced technology and advanced social structures giving the GM more options for varied challenges.  Technology allows PCs to realistically move easily between varied settings while the social structure makes political intrigue or corporate wars easier to do as well. The PCs can always go off and explore a lost civilization or uncharted planet whenever an old fashioned dungeon crawl is desired.  In contrast, incorporating futuristic elements into a fantasy campaign feels out of place to me and the game mechanics don't transfer as well either.  Having fantasy game PCs fly or teleport everywhere also seems a bit cartoonish for my taste.  In other words, it's much easier to go backward on the technology tree for SF than to advance up it with a fantasy campaign. <div><br /></div><div>What are your thoughts?  </div>