Herd immunity threshold depends on Ro. Ro for Omicron is Measles level -very high HIT will be near 100%. So might as well figure everyone is gonna get it. We were at 60-70% of population having nat immunity before Omicron. My estimates are that 40% of population is going to get Omicron. So.. we will be right there. Next year a different enough variant will come through and some people will get a cold. Also some people who've had previous infections, will also catch Omicron, and some won't ever catch it. But to your main point - this sucker is almost over. Weeks not months.