This seems a little bit more like the towel trick for the Xbox 360.

Yeah, I don't see any problems with that.

> Not sure how well geofences work in a GNSS denied environment.

If you shield your GPS antenna to only see signals from above, it will make spoofing rather difficult, unless the spoofer can afford constant aerial missions in just the right places.
If you want to get really fancy, use phased-array antennas that can "aim" at the known satellites and ignore other sources.

Keep your public keys private!

> processing speeds in the petahertz range — over 1,000 times faster than modern computer chips

I'm not aware of any computer chips that operate in the terahertz range.

In the first line, it mentions a factor of 1 million, which makes sense, since current chips operate in the gigahertz range.

> AI lies with its hallucinations. And does not like to be told it's wrong.

You know, if you substitute in certain politicians names for "AI", the sentence is still completely correct.
Unfortunately, the politicians are immune to swearing, unless it comes from major donors.

Now they just need (to make) more kids to buy them.

You can invoke Technology Connections' special trick: the magic of buying two of them.

Speak for yourself. I use a laptop with an external monitor whenever possible, because screen size is an issue.

I guess you're too young to remember full-page displays? They were designed to show you how your text would appear on a letter-size page, at scale.
Eventually, we got two-page displays, which were closer to today's aspect ratios. However, a 16" 16x9 display isn't great for even a full page
unless you scale things down a lot. For older users with presbyopia, this just doesn't work so well.

Also, the other use cases shown looked interesting: 2 virtual displays on 1, or extra space for special widgets.

Just because something doesn't fit the use case you have in mind doesn't mean it isn't useful.

Truth will always be biased against liars, and that is not a problem that needs to be fixed.

It won't be explicitly forbidden. Rather, you can drive, but the car can decide to override you at any point.
Cars without computer control will become rare luxury items, and new cars will require compute control.

When anyone can easily afford a 75" TV and nice speakers, why go to the theater?

AIs that are specialized in detecting cancer should be used to detect cancer. They are very good at it.

AIs that aren't specialized in a particular task tend to cause problems. That's where we need to be very careful.

Just don't confuse the two types together.

This of course suggests another, more effective solution: Just stop digging up and burning all that coal up in the first place.