A report from supply chain blog Macotakara — as translated by 9to5Mac — says the fourth generation iPad Air will offer USB-C connectivity, while the iPad mini will stick with Lightning connectivity. Currently, the only Apple table with USB-C is the iPad Pro.
The Sellers Research Group is a bit dubious about this rumor. It makes sense for the iPad Air to move to USB-C, but, unless there’s a technical problem, it makes just as much sense for the next iPad mini to do the same.