What will be the weapon of the Next World War?

Hey guys, Let us put on a discussion about the deadliest form of action today and what will it be in next 20 years.

Right now we are boasting ourselves on the prowess of Nuclear Tech. Warheads, Energy, nuclear based automation since they have become the attributes and power points of any country on the planet.

On the other hand, we see the rapid advancement in Biotechnology. Harmful viruses, hybrid animals, super humanized weapons, specialized and rapidly harvesting bio weapons have already started to surface the defense industry.

Not to forget Computers- Pure harvestors of automation, and total mass destruction. Hacking- in its most deadliest form, that can take down an entire continent with mere keystrokes and send it back to stone age disabling all kinds of regulated attacks, maybe missiles or anything. Everything today is monitored by a computer.

Commerce. Take down a country's economy by corporate politics and take undue advantage of Globalization, liberalization, foreign policies and all that legal as well as corporate combat.

Or the traditional good cop bad cop way. Send in a battalion, a squadron, a hundred jets, 100 navy stuff and fight in man-to-man

So fill in your views about the most deadly form of combat which would be emerging over this decade.