iPad Mini...2013 or 2014?

So first it was speculated that a new iPad Mini would arrive in October and come with a Retina Display, then it turns out someone else thinks it won't be arriving until 2014.... Well, here's what I'm thinking:

Why didn't the Apple launch iPad Mini with a retina display from day one? It doesn't make sense really that they would launch a mobile device with a standard non-retina display when all of their other mobile products already have a retina display?