Peak Oil

Today I read about the Peak Oil theory. From what I understood the point is that the worlds oil reserves aren't just going to "run out" in 30 years, but more that we've possibly reached the peak of the curve, and from now on oil will get rearer and rearer, possibly cause a huge worldwide economic crash.
Oil is used to create most of the machines we use, transport everything, even used to grow the food we love. When it starts getting scarce, we're going to have trouble, resource wars, crime rises, millions unemployed, and things of that kind of kidney.
Which makes me wounder weather its really worth planning to get a career in computer science or aviation. When neither of these are apparently going to be possible in 10 years anyway. I might be better making a crossbow and learning to use it, and spending my time learning how to grow my own food. Unfortunately doing that would make you look like a paranoid freak (like Noah, but at least God told him to do it), and somehow doesn't seem worth it even just to say "I told you so".
Still, it reminds me how fascinated I've been recently with the idea of a huge disaster wiping out everybody except (conveniently) me and my friends and family. And starting again in a subsistence sort of way as the trees break through the pavements and ivy covers the skyscrapers. I should probably be worried that I don't mind the idea of millions of people dieing, but I'll assume its a natural reaction to living in a city for too long. I just wish wild things would grow here.
Maybe in 2010 once we've killed each other over the last can of silver beet.