that zsar bomb someone posted about? a single kilogram of antimatter has the same explosive force
antimatter is real, not just a made up plot device, and it is coming... i would give it only 50-100 years before we are able to effectively harness it... then we are all in for some fun times
Maybe, but there are some huge barriers standing in the way. First of all, there are some serious technical issues that must be overcome if antimatter is to be used for anything. The largest of these is probably storage. If antimatter comes in contact with normal matter, it pretty much is annihilated instantly. Right now, the only way we have to store antimatter is to suspend charged antiparticles in a really good vacuum. Unfortunately, all of the antiparticles must be of the same charge, which means that they are all pushing against one another, and therefore you can only store a small amount in any given place. There are also technical issues related to producing antimatter in the scale necessary for weapons use. I don't really enough to comment on it, so I'll skip it for now. There's also a fairly large safety issue. With nuclear weapons, a fairly complex set of reactions has to take place to spark off the initial chain reaction. With antimatter, however, an accidental explosion would occur if containment slipped for even a small fraction of a second.
In addition to these, there are all sorts of political and practical considerations. I don't really want to go too deeply into this, but a fair amount of it could be summed up as "why bother?". Any nation capable of researching these devices already has the ability to build enough nuclear weapons to wipe out any possible enemy, and antimatter weapons aren't really going to offer much benefit over nuclear weapons.
With that said, 100 years is a long, long time when it comes to technological development. Antimatter has plenty of other potential uses, and it may be that once these issues are solved in another field, then antimatter will look more attractive as a weapon. Until then, though, there just aren't enough benefits to these weapons to see the sort of research that made nuclear weapons so common and powerful.