Since 2014 more smartphones were shipped than traditional computers (desktops, laptops and servers together) - over 400 million units annually. Most of them have unix inside running on a fast processor, adequate memory and persistent data storage.
The price due to the production volumes is affordable also for industrial applications and the quality is guaranteed by production volumes.The new consumer products are also Industrial grade electronics and software due to their production volumes.
The software architechture of Apple iphone and iPad, Windows Mobile and Android makes applications hardware independent and separates data from algorithms and user interfaces. This is fundamental for the lifecycle cost of the system.
The industrial High Availability requirements are easiliy implemented through: