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Ken Macleod's 'The Restoration Game' is a fun take on it too.

My biggest gut reaction against the simulation argument is how hard we find it to simulate our universe. Most simulations use heaps of approximations or special cases to make progress. I think it takes a supercomputer to do justice to the full quantum mechanics of just a few hundred atoms. Maybe things get more tractable once we can build quantum computers? Or maybe all the weirdness of quantum mechanics is a symptom of the approximations of the underlying simulation?

Did you take a look at the article? That was the point. They argued that aspects of the physical world (which we cannot explain?) look similar to the types of simplifications one would make in building a simulation.