The CDC has estimated the overall hospitalization rate since the start of the pandemic at about 5%. Now with vaccines and other improved outpatient therapies the hospitalization rate is dropping.

https://www.cdc.gov/coronavirus/2019-ncov/cases-updates/burd...

The Omicron variant R0 value appears to be somewhere in the 7 - 10 range.

https://www.thelancet.com/journals/lanres/article/PIIS2213-2...