So tomorrow's smartphone will be 20 times faster and only cost 10 times as much?
But 10x faster (or capable) and 2x the cost? That's not outrageous. BTW that's where we currently are.
https://en.wikipedia.org/wiki/Motorola_Atrix_4G#Webtop
https://en.wikipedia.org/wiki/Ubuntu_Touch
Have you been in a coma for 5 years? That has already happened.
The most power hungry component is the display... The technology there has not kept up, in fact they grow bigger and consume more power.