With that said, I wouldn't be surprised if there was a spec bump in the iPad Pro, but overall iDevices are wild cards and not expected, same with iMacs. I would expect to see MacBook Pro, Macmini, and MacPro news... If not I'm going to be very weary about Apple Hardware, which I'm sure we can all agree have been neglected, not only by supplier components, but even the occasional bump in specs (more ram, better drives, etc. in the past it seems that there was something to throw at to avoid stagnation, which I think is where most of the Hardware line is at the moment).
Yes, WWDC is geared towards software and developers, and Apple pretty much dictates iOS apps are developed on Apple Hardware, especially when selling those numbers with metal and other Apple technologies, the developers are nearly if not more excited then us for some raw power and hardware upgrades.