Macs will take 50% of the laptop/desktop market within 6 years
As said, no chance for this. Big companies and corporations are far too entrenched in Windows to get out. Mac OS currently has about 10% marketshare. I'd say... in 10 years, perhaps Apple will be able to grow that to 15%, but not much more.
Soon, if you want the fastest computer you have to buy a Mac
For laptops, maybe. For desktops, it remains to be seen.
If you want a laptop that has the best battery life, you have to buy a Mac
In 5 years, this may not be true anymore.
Apple will release a Macbook SE priced at $700-$750. They couldn't before because cheap Intel chips were too slow.
They may just end up selling the previous generation device at a discount, so yeah, at least this seems probable.
Many iPhone users (50% market share in U.S.), iPad users (65%), and Apple Watch (55%) users bought cheap Costco laptops. Apple can win these customers back with an affordable Macbook.
Maybe, but not a big chance here. See point #1.
AAA gaming will come to Macs. Even the slowest Apple Silicon GPU is as fast as a 1050Ti. Soon, the median GPU in a Mac will be faster than the median gaming PC. Combined with a projected 50% market share, AAA game developers can't ignore Macs. Apple will take a cut of every AAA game sale because they will have to go through the App Store just like how they have to go through Steam on Windows.
There's actually not that big of a chance for this. The hardware is capable, but Apple isn't making gaming any more accessible, nor are they making a big push for it.
People have said that there was no point to Switch because iPad existed. 3 years later? Switch wins by a landslide. In terms of hardware, the iPad was way ahead of the Switch even on its launch, and yet there are not that many games on the iPad that can even be considered AA, let alone AAA.
And the advent of services like Stadia and xCloud may ultimately make the idea of a tied-down gaming system moot since you only have to subscribe to a "low" monthly fee ($10 for Stadia, so about $120 a year, or $720 in 6 years, that's about the average amount of time anyone will actively use any dedicated gaming console), and you can play AAA games on any device you own. Most people don't have access to the level of internet required to get these services to work properly, but give it 10 years and we may see the death of dedicated gaming devices, even. So that makes Apple even less inclined to do something about gaming per se.
By increasing their laptop/desktop share, Apple will sell more Apple One+ subscriptions because they're adding one more major device to the customer's ecosystem.
Apple One+ is a great service for Apple device owners, but it's not so accessible to owners of other types of devices. That's why it has not picked up. In contrast, people are okay with paying for Amazon Prime, Netflix, etc... because they can make full use of those services on a wide variety of devices... including their game consoles and their TVs.
Apple is no longer a brand just for the wealthy.
Eh... they have a Pro Display XDR for $4999, the stand for the display is $999, and they sell wheels... (freaking... wheels!) for $699.
I honestly don't see how you can describe Apple as being "no longer a brand for the wealthy".
Just because Apple has some low-hanging fruits like iPhone SE and iPad to cater to the lower-end of the market doesn't mean that that's the core of their business. Beyond that point, the iPhone SE may be faster than any Android phone in existence, but
Android still commands an overwhelming 85% share of the smartphone market. So again, speed and hardware aren't the key factors here.
All Apple just did was finally get the Mac line to be the machines they should have always been, not more, not less. But I expect we'll see less of a jump in improvements with the next few generations. It'll be the usual "up to 1.5X", "2X" faster claims again.