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While an Apple Watch can’t detect a heart attack, first aiders (and each of us) can use the heart rate monitor.

I know someone who was having a major heart attack, he just thought it was a chest infection and had been having chest pains off and on for a few weeks, but as he kept not feeling well his friend got a first aider to look at him (they were at a venue away from home).
First thing the first aider did was notice he had an Apple Watch on so took his heart rate which should have been around 60 but was actually double that when he was sat doing nothing. Ambulance came, paramedics confirmed he was having a heart attack and his life was likely saved. He had 3 stents put in the LAD artery that day. This chap was fit and used to row 13km a few times a week. Think Bob Harper scenario.

So no, an Apple Watch can’t detect a heart attack but is still useful in this type of scenario.

GeorgeBMac said:

For me the issue is complicated by Family Sharing:   My grandson can take out a trial subscription -- which often reverts to a full year subscription -- without my knowledge.   The only notification I get is an email and, if I miss it, the subscription goes into affect.

But who authorises and pays for the subscription?
Is this purchase an “Ask to buy” and you authorise? If so, that is on you.
If not “Ask to buy” and you give him carte-blanche to buy anything that is also on you surely?

If your grandson has “ask to buy” enabled for him but is able to sign up for a free trial and subscription without you authorising it then you have a case. Otherwise...

GeorgeBMac said:

So, what does 120Hz refresh do for you?   Is it only for gaming?

Likewise:

What is "10 bit color depth" and what does that do for you?   (actually, sounds suspiciously like "a two-bit frill").

Should I be excited about either of these?  Do they justify the 2/3's markup over the base iPhone 12?   (Yeh, I know there are other sifferences, but they don't interest me)

Personally I’m more excited by 10bit color than the 120Hz refresh.
I think at times color depth is even more important than resolution.
Going from 8 bit to 10 bit is not a small jump. 

“This means a 10-bit image can display up to 1.07 billion colors, while an 8-bit photo can only display 16.7 million.”

https://www.bhphotovideo.com/explora/video/tips-and-solutions/8-bit-10-bit-what-does-it-all-mean-for-your-videos

In the short and medium terms ahead, we will likely have a choice of Intel or ARM.
People that need to run Bootcamp or Windows under emulation can still buy an Intel Mac.

In time, it will ultimately become a choice of better performance or Windows support.
I'll be buying ARM for better performance.

The demos shown running on that A12Z were pretty impressive, I especially liked the Maya demo.
The A12Z is a tweaked version of the 2-year-old silicon, so what chip will the first ARM Mac launch with?
My guess is it will be an A13Z

What happens if they can release a MacPro with multiple A14Z processors in two years' time?

I've upgraded with Apple the first generation of each move; first-gen PowerPC, and first-gen Intel.
Apple has always got it right.
My first day bought Intel MacBook Pro lasted me over 7 years with not a single fault.

The next few years are gonna be exciting!

Intel has no-one to blame but themselves for not advancing. I wouldn't be buying Intel stock right now...

The slow pace of technological advances dictates the long game.
AAPL is uniquely positioned for this.

VR will find its niche’ in medical or a subset of console gamers but as an exclusive tech (in the sense that it excludes everyone else) it will never be mainstream for the masses. Even in niche environments the quality needs to advance greatly, nobody is interested in low res.

Apple always chooses tech advancements that can benefit most people, not a tiny niche’ - that is why they choose AR over VR.

It’s been the same with 3D movies with 3D glasses. I love 3D blu rays, but I watch them on a 135 inch projector screen not a little TV.
3D movies are a niche same as VR. Most people do not have film projectors, they have TVs.

AR is a much larger opportunity to enhance or “augment” the lives or “reality” of many.

When we have Apple AR glasses in the future we will have life-size group video chats, better than the holograms we sometimes see in movies.
And the use of Lidar tech will mean our full-size video chat friends can sit on our sofas or at our business meeting tables.