It will be interesting if Apple does announce a move to ARM for (at least some of) their macbook range. Not surprising though, as Intel has refused to remove the vulnerable backdoor [1] (Intel Management Engine) from all their new chips, companies like Google and Apple want more security and privacy for their platforms.
While ARM is not perfect, it does allow companies like Apple more control over the secretive firmware that boots these chips.
Apple's x86 chips run a custom gutted ME.
To reduce that attack surface, Mac computers run a custom ME firmware from which the majority of components have been removed. … The primary use of the ME is audio and video copyright protection on Mac computers that have only Intel-based graphics.
https://support.apple.com/en-au/guide/security/seced055bcf6/...