[quote=@Darkmatter]
I think a lot the issue can be summed up with the following rhetoric I often spew;

Good Sci Fi has cool lasers and explains how they work. 
Amazing Sci Fi illustrates why those lasers are being shot and by whom. 
[u]The issue with these Sci Fi Rps is the laser never getting fired, only discussed.[/u] 
[/quote]

Too many people are interested in creating these grand design ideas and concepts but never really follow through with them as they want that perfect moment to "release the power" so to speak. Something that I have noticed when comparing some Fantasy RPs to Sci-Fi RPs is that the Sci-Fi RPs tend to go over and above in the ideas, thus making them less useful during normal situations; where as fantasy seems to allow for for the more often use of magic.

For instance:
In a fantasy a mage could throw a fireball and that would be his main attack.
In a Sci-Fi a soldier would have a BFG9000 and use it only in special situations.

Now I know that it's not for every roleplay that this will happen, but I believe that people should possibly think about adding more trinkets to the world to help with the immersion. A droid that follows them around, a communication device, a contact lense with a HUD, even a cybornetic hand or a keycard reader. Little things like these help improve the immersion and thus leave the big BFG9000 not as the world building tool, but more the 'Oh Damn' moment [i](however it still doesn't change how the gun is a special situation item)[/i].