Has the date of any announcement been made officially? I’ve seen mention of 4 January, but maybe that’s just speculation.
Not officially "official", but pretty much yes. The date has been mentioned in the French Naim forum by the member genesis who is a dealer or involved with Naim/Focal as far as I can tell:
https://www.synthese-hifi.com/phpBB2/viewtopic.php?t=20993
Also Signals, according to their latest newsletter, will have an event on 11-12 January and it will be bookable from the 5th onwards. They don't mention Naim per se, but you would have to be blind not to make the link
https://signals.uk.com/wp-content/uploads/2022/12/Signals-2022-roundup.pdf
So I would say it's pretty official... One week to go!