i think i've seen enough of the early data and informed speculation to form a preliminary opinion/prediction:
for now, my expectation is that it omicron is able to escape natural immunity and probably older two dose mrna-vaccine immunity long enough to briefly render a host infectious, but not long enough to cause much serious illness or death.
not natively more transmissible than delta (probably less). no prediction currently on how it responds to boosted vaccine-induced immunity.