Recent news reports a drop in the number of mobile phones sold in the last quarter. We seem to be in the same kind of cycle as we had for desktop PCs then laptops. The technology has become good enough that the perceived need to upgrade is being eroded. A two year old phone is adequate for most uses.
For PCs and Laptops the real drop in sales volumes has been caused by displacement by alternate more convenient devices. Will this happen with the mobile phone? What will the compelling alternate device/interface that eventually displaces the mobile phone as we now know it? There are a variety of options on the horizon, wearables, augmented reality, neural nets or perhaps something new we are not aware of.