tbf, data has to appear at some point.
Washington Post has a report about what they say is the first omicron in-depth laboratory study. Doesn't make great reading to me, although some of the experts quoted say its a mixed bag of good and bad news. And of course the caveat that this is one study that has yet to be peer reviewed.
It looks like antibodies from a previous infection aren't much use against this variant and current vaccines aren't as effective but with boosters should be enough to prevent the more serious, and fatal, outcomes. "The scientists reported a large, 41-fold drop in the virus-blocking ability of antibodies — 'much more extensive escape' than seen against previous variants using similar experiments", "Omicron evades most of the vaccine response. We don’t know what will happen with hospitalization or severe disease".
Explains the sudden push for boosters and why the number of people not vaccinated at all seems to have come back into the spotlight.
Vaccines are being altered to target omicron but by the time that's done, manufactured and ready to go into peoples arms the omicron wave might be over.
Of course the key to this may still be what things look like on the hospitalisations front once we've waited out the lag period and can see the impact omicron is having. Hopefully it will turn out that it is mild and doesn't generate hospitalisations, if that's the case being more transmissible and vaccine evading becomes less of an issue.