I normally work on the principle that you should leave two generations between buying new iOS devices, ie I replaced my 4s with a 5s. This should mean that I replace my original iPad mini, with next year's model. Here is where the possible self deceiving comes in to play. I'm strongly considering buying this year's model, here is how I'm justifying it to myself. The original mini was a small iPad 2, while the new mini is a small iPad 5. Which means it's not one gen ahead, but actually three. Is this self delusion?