I think the new Mac's will be launched in Q3 2021 unfortunetly. The event next week is mainly for the iPad Pro which will probably be as fast as the M1 Mac's currently since they share the same chip design (A14) and the iPad Pro is also fanless like the M1 MBA.
However, Apple could surprise us with an entry level M1 iMac? This is not super hard to do. Just put the M1 that is currently in the MBA / MBP 13/ Mac Mini in the entry level iMac and start shipping. This machine will be fast enough for 99% of the people who do simple facebook / youtube / e-mails / word. Even my 12.9 iPad Pro and iPhone 11 Pro Max is overkill for such things.