Well, I'm roughly half-way through with MGS2, and have learned the following about the future:
1. Everything is controlled with nanomachines in your blood. Thinking, talking and moving around are all thanks to nanomachines. Keycards are also directly linked to your brain, allowing you access to high security levels, although you still actually need the keycard.
2. The world is controlled by a super-secret shadowy organization that no one knows about, and control every government and war and so on.
3. Entire continents can be, and probably are, massive organic robots built hundreds of years ago for use by the military. Failing that, they're probably holograms.
4. All terrorists wear the same black balaclavas, ski masks, and uniforms, as well as the same Russian accent. The two or three terrorists with different uniforms can do things like see in the dark or turn invisible.