The first desktop that I purchased was about a decade and half ago. And all the processing power that it had was a measly 800 MHz. Throw in a RAM of 128 MB and I had a pretty good PC that time. Of course, that PC helped me write more than 150 of my early stage articles and prepare two books for printing!
Now, 15 years later, the configuration of that PC sounds funny. 800 MHz processor! 128 MB RAM!!
Forget PCs, the mobile phones of this era have lots more processing power than what my old friend had. And the good thing is that they are not done yet.
There are many phones with processors of more than 2 GHz in the market now. And then there are many more joining the race.