We selected the current iPad. My grandfather has never used any computer in his life, at best he has used a typewriter a few times. In this case is was more for video conferencing (FaceTime) so, the screen, camera and microphones were high on the list of importance. His eyesight is really good since he had cataract surgery about 6 years ago, he still reads constantly. Ease of use and robustness was the most important since I live 1400 miles away and none of the nearby relatives have any technical skills.
The hard part was - the supervised care home he lives in does not have WiFi so we had to use a cellular hotspot. I went this route instead of buying a tablet with built-in cellular because, I could set up and test the tablet before I went out and just had purchase a hotspot from the company the had the best service at his location. I stripped the interface/ apps down to 4 buttons, FaceTime, ibooks, freebooks app, messages, and then a folder for settings and everything else I could not turn off, restrict or remove.
Being that he is a WWII vet and then worked in a factory for decades, he is very deaf. In testing it with my brother I was using AKG K240 headphones in hope with hearing aid and the headphones he might be able to hear, I did not want to use earbuds since most old people get wax build up problems from the hearing aids pushing the wax back into their ears, I did not want to make that problem worse. The AKG K240 headphones are an open air design that allows sound to both leave the headphones and the wearer to hear sounds outside the headphones. When the volume was very loud the bleed from the headphones started to cause problems with the echo canceling in FaceTime. The audio would get choppy as the echo canceling had more volume then it could deal with. I picked up some AKG K271 headphones which are a sealed design, and that solved the echo canceling issue. I found it strange to not be able to hear myself when talking, I figured he is likely used to that. As it turned out he has to have it at full volume but he can hear better over it then if you in the same room with him. He is past the gain before feedback levels the current hear aids can deliver, I don't see that improving much more anyway.
Photo stream was an added bonus, I never used it before or cared about but my brother started sending my grandfather's iPad photos, so we invited all the relatives to his stream. Now all the grandchildren and great-grandchildren can send him photos and movies that they make.
The contrast, icon sizes, clean look and that every household in the family had a least one iDevice drove the iPad selection. Only a few households had Android devices. It is very easy to tell someone is trying to contact you on iOS. I still struggle with at a glance knowing who has contacted me and in what way on my Android.

I have never had any problems charging any apple product with a non apple charger or charging other products with an apple charger. Then again I don't buy $2 POS chargers. There might be a good reason the iPhone will not accept power from it.
Maybe you want to get out a meter and a scope and look at that charger closer before you have a car fire.

I don't have solar and the cost of transmission listed on my APS bill is around 4 dollars a month along with about 10 other charges they hit you with before they even get to the power usage. So 4.95 charge the use the grid looks like now the solar customers will be subsiding the non solar customers. APS was asking for 50-100 dollars a month grid fee to solar customers which is just insane. That is higher then my winter power bill. Given a choice most of the people in the state would not use APS for power.
Next we need to tax all those bike riders that we are subsidizing with gas taxes, they are even demanding bike lanes. The water department needs to add a few fees for all those low flow shower heads and toilets that people keep installing.

The Mac Book Pro will do 4k at 24 frames

That is not the norm. I only one that I have been in that I would call very nice is the Mayo clinic. I live with in a few miles of some of the best in country, and I design systems for hospitals from time to time, while they are no longer at the motel six level, they are far from even a Hampton Inn. Hospitals have always had things like chair rails and expensive fixtures just now architects have decide change from the 300 dollar fixture to the 300 dollar fixture that looks nice. The industrial plastic chair rail never did look nice.
Better finishes are not a major cost driver in hospitals. The equipment and systems are the real costs. Maintaining them is extremely costly, if you have open a wall or even pop ceiling tile in a sterile area, it a major and costly endeavor.

For pointing me to an organization my kids would rather be in.

Not that most construction is not already made by adding layers of materials on top of layer placed before it.

The three US auto manufacturers switched to metric in the early 80's. There hasn't been a car built in over 20 years that is not metric.