I'd say that's a premature call and that we will find out. Much as I like Apple, "Apple Silicon" isn't some magical pixie dust that only apple can manufacture. Yes it is proprietary Apple tech in there, but the things they are doing are not some incomparable tech that others can't also produce, given the motivation.
No one else in the industry has
attempted to build a high end ARM part yet (well, not since the RiscPC in the mid-late 90s) because they either aren't in the laptop/computer market or haven't wanted to be the one to take the risk on it.
Apple, with their massive bank balance was in the position to do so. M1 is only the start of what I suspect will end up being a flood of competitive ARM based machines from various vendors including Nvidia (think, ARM based core with onboard Nvidia GPU/AI/ML tech).
You think Nvidia, who now own arm can't do it? Please.... if M1 succeeds, and it will - Nvidia for sure will offer something competitive with or faster than whatever Apple put out for other hardware OEMs. Amazon are already using high performance ARM (for their own servers), just not for the market apple is in.
People may not know but the original ARM processors from the 80s were much more powerful than x86 of the day. The only reason they failed was due to inadequate marketing and x86 commodity hardware due to the decision by IBM to use the 8088 in the PC (and thus everybody wanting a DOS compatible machine).
People may actually be surprised when it is Nvidia, not Apple who conquer the PC market. Apple will still maintain a significant share, but Windows on ARM based Nvidia SOC is likely where the bulk of the market will probably end up eventually.
Nvidia probably bought ARM in order to ensure that even if AMD try what Apple is trying, they're now paying Nvidia a license anyway