The iPhone sales will go down, if they can't keep innovating on the Mac side. That is one huge reason, I am still an iPhone user even though I am bored of the design and iOS at this point. Just my two cents...
Even if all Apple announced was the OLED strip for content aware functions, that's a significant innovation…despite how hard so many people on this forum try to downplay it. Compare that to the Surface Studio, which had fairly minor innovations in comparison (screen size/resolution for a large scale pressure sensitive device).