It's definitely a sign of the decline of hardware innovation. It's not for lack of trying, however. Apple has experimented with Touch Bars, VR, and LIDAR camera

It's definitely a sign of the decline of hardware innovation. It's not for lack of trying, however. Apple has experimented with Touch Bars, VR, and LIDAR cameras, largely to little effect. They just aren't disruptive enough. So how then do they segment if not hardware? Software. I think that growth is going to slow no matter what they do. Western and Japanese markets are saturated, and Chinese markets (once most promising) are bringing fierce competition both from local competition and the government.