Apple hasn’t done much to mix up its iPad line since the introduction of the iPad mini in 2010. If the company is looking to add to the line, a 13-inch iPad would be an interesting change. The slightly bigger tablet may benefit organizations such as schools, hospitals, and businesses. However, something to consider would be the value that most iPad users place on portability. A larger iPad might not appeal much to the general public.
Though a few sources are saying that the 17-watt charger is being developed for the September 10th media event, it’s not likely. The event is based solely around the iPhone, and since the iPhone only uses 5W, the charger probably isn’t related to that product. The idea of a 13-inch iPad is purely speculation at this point.