simple
mobile is for consumption.
desktop is for production.
as the worldwide Idiocracy grows and more people need to watch more slideshows on their social media platform to find out what to be Outraged Next about, naughty selfies from nigerian scammers, and an app to figure out what is the politically correct way to hang the bog roll (roll from the front, natch), of course there will be a higher percentage of sales of "consume" devices.
Those who actually produce, not simply modify someone else's work, still need large screen real estate, the ability to handle lots of processes at once, multiple input and storage options, severe number crunching power, and the ability to modify how their system functions.
Which you're not gonna do while wrapped in a hoodie, gaze down, ears blocked by headphones, thumbing away whilst standing on the tube getting to your Next Big Startup job.
Biting the hand that feeds IT
