So. A bit of news from monitoring the research chatter:
The wonks are saying that the new variant is, basically, as different from Omicron as Delta was from the original version. (You remember Delta, right?) As such, they are saying that the new variant most likely will punch through the current (and proposed for this fall) vaccines, due to the number of mutations. So while getting the vaccines currently under development or available will protect you from some strains (which is good - they are still around), it will not offer much help for this one (BA.2.86).
They are saying BA.2.86 has been around for a while, as there are already offspring variants with different mutations developing in different parts of the world. So it's been flying under the radar. They have now identified 29 samples - in Denmark, UK (2 in England, 2 in Scotland), US, Israel, Japan, South Africa, Portugal, Sweden, Canada, and France plus in waste-water from Spain, NYC and Switzerland.
The US is doing almost no monitoring.
The UK ramping up Covid monitoring is the sanest thing they've done in years. Telling people the existing vaccine will be effective against BA.2.86, not so much.
On the good side, the wonks are also saying that it (BA.2.86) doesn't appear to be as highly contagious as the current XBB strain at present. (Not that it's not contagious, just not as wildly contagious.)
However, because I just have to leave things on a dismal outlook: They are much more concerned with what the potential offspring of this virus could mutate into. Apparently the first strains of the XBB series were nasty, but not so highly-contagious until it mutated. So they are worried that the BA.2.86 could do the same - and there is no vaccine for it yet.
And, of course, the more times you get any variety of Covid, the more damage you are doing to your immune system and, potentially, inner-workings. Even if it's "just like a mild cold". Or you don't realize you're infected. Nice.
So do take precautions? Filter your in-building air with at least a hepa/MERV13 filter, or even opening the windows, wear an N-95 or better in places with poor airflow, and avoid crowds.
Good luck.