Smallpox is also a killer of mind-boggling proportions: when the campaign to eradicate it began, in 1967, it was killing 2m people a year.

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"There is nothing about this case that is rational or makes any sense, " attorney Bryan Konoski told jurors in a closing argument in a trial that centers on a schizophrenic killer's state of mind.

WSJ: Closing arguments start in NY meat-cleaver killing

As I sit here thinking of how nice it is, my mind reflects on the history and quality of killer apps.

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But if you don't mind finding your own software, or already have a server setup, this is a killer media-streaming device.

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