Gad, I must really be in the dark ages.  I don't even have a cell phone.  Here is why, when I was working, I had to answer the phone within four seconds, when home had to answer the phone etc.  Now that I'm  retired, my wife gets so mad at me for not answering the phone.  Why should I?  I got a new fangled thing call an answering machine and if your call is important to me (it usually is not), I will call you back.

 Now for the cell phone, it great if you don't have On-Star where you run into problems and need help.  The problem is:  there is no such thing as a cell phone (one that has a touch pad for dialing, a mike and a place to hear from).  What it has is the insides of a Boeing 757, a heads up display etc and the buttons are too darn small, I need a pencil to dial and that pencil must be have a sharp point.

As for desktops, I can see the size of the main unit getting to the size of a one inch cube with wireless connections to a 43 " plus screen and to me Wacom tablet and standard size mouse that doesn't have that darn roller ball to move the cursor and a decent keyboard with tabs big enough so I'm not mashing two or more tabs at the same time.   That cube however would have to be mounted to something so that you don't  knock it around or forget where you put it.  Upgrading would simply be buying a new one for the present cost of upgrading.  Jan