"It is ok if you are tech minded but what about the millions who are not."
An entire generation of people of working age grew up with computers. They have used each version of Windows since Win 95, and they have little if any difficulty getting the feel of each new release.
The next generation is using computers at school on a daily basis, and most of them probably know as much about operating systems as their teachers. You don't have to have the slightest clue about how a computer works in order to use it - those days are long gone, just as the days of people working on their car's engine are long gone - you try to tinker with a modern engine and see how far you get.
A computer is simply a tool - it's there to help you to do things. It isn't an end in itself.