Interesting: The South African doctor who first announced the new Omicron variant of concern, said she and other South African doctors are seeing increases in the infection rate which indicates Omicron may be better at transmitting. BUT those cases tend to be milder than usual, with fatigue and headache the main symptoms. So there is the possibility this variant is "the end" of the pandemic: A variant that infects most of the immunologically naive, but causes few hospitalizations or deaths. A "natural vaccination" variant, so to speak.
When viruses mutate, this is always a possibility. Increased fitness, but decreased virulence, because the former has selective advantage, while the latter does not.