If you're reacting to this based on headlines, I definitely recommend watching the video. It really does a good job of addressing things.
- They expect a full transition for _new_hardware to take 2 years.
- Existing hardware will continue to receive mac OS updates for the foreseeable future (given that iOS 14 supports the 5 year old iPhone 6S, I'd anticipate at least the same 5+ years of support).
- The demonstrations of mac OS today were _all_ on devices that have the same internals as the latest iPad Pro, albeit with 16GB of RAM.
- As with the PPC to Intel transition, they are making it easy to compile universal binaries that work on both, and converting Intel-only apps to work on non-Intel hardware (great if the developers don't get around to updating). I used PPC Photoshop CS2 on my first Intel Mac, and this looks _way_ more performant than that.
Watch the video. It's smooth, even in demanding pro apps. I am very excited.
Edit: updating iPhone/iOS 14 support.