First reaction is that this is good news, but I think two things needs to be looked at: One, what drives people to replace devices? I feel (not scientific at all!) that wanting a new shiny device and, if broken, cost of repair, are higher on the list than not being able to repair. Two, the law of unintended consequences: Making devices more repairable may increase their footprint in terms of material and thus waste.…
I had to abandon my last few phones due to cracked screens, water damage and other hardware faults. Even if I could find replacements for the damaged parts (and I tried), they wouldn't be official and would likely be of a lower quality. Furthermore, most modern phones are really hard to put together to the original quality standards, requiring for example new pre-cut adhesive and whole new backplates, since the original ones will get scratched during disassembly.
My purchases are (at least partially) driven by wanting a shiny, new-looking device that doesn't have any flaws. But, perhaps counter-intuitively, proper repairability would allow me to maintain my devices in this state for a much longer time, which would lead to me purchasing fewer new devices.
Repairability this good would also be great for the used market. Right now you never know what faults a phone/notebook/other miniaturised device might have and if they're there, getting rid of them might cost as much as the device. This means that people who want 100% working devices are more likely to buy new. For other products (for example desktop PCs), the chance that an irreparable fault exists is much lower, so buying used is safer.