Smartphones are nowhere near extinction to be honest. Wearables are largely still accessories to smartphones. I would even like to dispute that the smartphone market is a mature market. It might be mature in the developed world but here in the developing world smartphones are still emerging technologies.

Smartphones as we know them could change. I expect them to become more integrated with other technologies to create a smarter environment. You can already see this kind of integration with the development of windows 10 and universal apps. AI capabilities like Cortana are being extended and deployed into new areas like Microsoft office.

To be honest, this article was poor and not thought through....