Apparently we have very different ideas of showing off products meant for developers. That's not the same thing as making things developers can use for consumer-focused applications. When is the last time WWDC featured developer-focused hardware, meant to improve developer productivity—or even something as subjective as happiness?
I think it's more accurate to say iOS developers are their focus. Apple just opened an academy in Italy for those developers, and gave them their first taste of programming on the iPad via Swift Playgrounds, a language Apple created for them.
They'll probably have an IDE on the iPad Pro, AKA the future of personal computers according to Cook, before we even see a hardware refresh with Kaby Lake.