As a geologist in the oil industry, this is one of the few articles I've seen on peak oil that absolutely nails the salient points. (And even gets the geology correct.) To quote: "Most simply, peak oil is about rates, not amounts." Yes, there are a lot of unconventional resources. They're just a lot harder, more expensive, and most importantly in this context, slower to produce. On the upshot for me, and the downshot…
Inflation-adjusted, the price of a barrel of crude oil was $23 in 1960, and has been averaging almost $88 in 2013. What does that do to, e.g., suburbs designed around 1960's oil prices?
Most of the interesting questions when it comes to oil have nothing to do with "what happens when it runs out?" The fun stuff is before then.