What's the third smartphone platform? Is it Windows phone? Is Windows Phone going to finally get off the mat in the developed world? Amazon believes their platform has a chance to become the third.

Amazon's 'Twitch' appears to be creating a service that operates like Twitter.

By the 2010s, almost everybody in the developed world, it seemed, had a powerful digital device that took little or no special skills or training to use.

For many years, even as users became more sophisticated, personal computers took too much effort to use without problem-solving, keeping alive the yearning for greater simplicity. Microsoft's dominant Windows platform, in particular, was a home for all manner of bugs and problems that required IT people to straighten out.

Even Apple, notorious for keeping a tight grip on its products, allows fierce competitors like Google, Amazon, Spotify, and Microsoft to offer their apps on its phones and tablets.

I see retirement as just another of these reinventions, another chance to do new things and be a new version of myself.