Today's kids will shape tomorrow's consumers and today's kids think desktops are archaic and inconvenient! They are being raised on phones and tablets and game consoles. Corporations are moving more and more to mobile computing and bring your own device strategies as well.
Today's kids are being shaped by adults into tomorrow's consumers.
Any kid that used a "fast desktop" will not think it's it's archaic and inconvenient.
Most kids don't know what "fast" is. Just like to most kids a 64Kb encoded mp3 "sounds fine".
Kids used to want laptops because they didn't have to use mom's and dad's computer. Now they want a tablet because it's even more convenient than a laptop.
Or because their friend has one.
What they are being raised on, is developed and marketed and sold by adults.
Corporations are moving towards what they believe is the most profitable direction, or what they believe will bring in the most venture capital. Either way it is done for the benefit of the corporation first and foremost. Consumer benefit (actual or perceived) is almost a side effect.
Of course there is a lot of keeping up with the Jones' going on when it is necessary....
We are all part of a market segment or someone's target demographic...