I’m sorry, if you really want an answer to this, “for some reason” will have to be a lot more specific. The short version is; I don’t see swords coming back into use anytime in the near future.
The only situation I can think of, in a modern setting, where a sword would be preferable, is if you were dealing with things that could take an inhuman amount of damage without being affected, and where lopping body pieces off is the way to go. I’m thinking classic horror monsters, here. Even then, there are shotgun loads, and anti-materiel rounds for that kind of situation.
If you want a crash course in using firearms to hunt the supernatural, I’d recommend Ultraviolet, (the TV Series, not the film), about modern day vampire hunters, who’ve adapted modern technology to deal with vampires. They strap cameras to the ends of their guns, in order to quickly identify vampires (the whole, no reflections thing), load their weapon with pressed carbon fragmentation rounds (to effect the wooden stake through the heart), use gas grenades designed to respond to the chemical weakness in the old garlic folklore. In short, it’s a very inventive (and at six episodes, very short), look at how one can adapt modern technology to hunt monsters.
If you’re thinking of some kind of apocalyptic event, I’d refer you to Eternity Road by Jack McDevitt. It’s a post apocalyptic novel about a group that sets off from St. Louis into Canada in search of a lost archive of pre-plague books. The main thrust of the setting is that the printing press is lost technology, but firearms remain in frequent use.
The problem being; guns are incredibly easy to manufacture, and basic gunsmithing is common enough, and useful enough, that it’s unlikely to be lost.
On top of that, an apocalyptic event like that would snuff out most of the interesting things we’re seeing in modern forging technology.
If it’s a technology marches on, kind of situation, then there isn’t much that could really negate the bullet without making a sword equally useless.
On what we can actually do right now, the only thing that comes to mind is cryoforging; I suspect that’s a trade name. From what I understand it’s just a tempering process involving liquid nitrogen to quench the blade. It supposedly results in an improbably durable weapon that will keep its edge through almost any abuse you can throw at it. I’d take this with a grain of salt; the only material I’ve seen on it was from a company that was selling cryoforged katanas back around 2002.
On the “in the year 2000” side, it depends on what your setting has, nanotechnology might be an option. Pick your poison on what you want a nanotech blade to do. But it’s worth pointing out that in the real world, nanotech research has gotten mired pretty heavily in patent conflicts, and the entire field is at risk of stalling out.
Carbon Fiber Weave swords are another possibility, basically this is a plastic, but it’s fairly durable stuff. I don’t know if the current iteration of the technology can hold an edge in combat, but edgeless training swords have been around for years.
If you really want to play in that range, I’d say dig up all the William Gibson and Neil Stephenson you can stomach. They’re the architects of modern cyberpunk, and really almost required reading if you want to push the envelope of what can be done with technology. For Stephenson, I’d recommend Snow Crash, and Cryptonomicon. With Gibson, I think Neuromancer is the place to start. If I recall correctly, Snow Crash is the only one of those which really talks about a character using a sword. Still, if you haven’t read them yet, and this is the genre you’re looking at writing in, they’re all worth your time.