Right - because the ability to take your work with you - and work from anywhere in the world - has poor value. And, the ability to "recycle" the poor value for 50-75% of the purchase price 2-3 years later also has, "poor value".
I don't need or want to take work with me, and I use computers until they die, or no longer perform well enough to get work done. I'm not going to pay extra for miniaturization and a screen, when I don't need it or want it.