Launching the M2 does not mean that the higher performing M1 chips, Pro/Max/Ultra, are outdated or are lesser than the M2. the M2 is not expected to be dramatically faster than the M1. Those performance variants will still be faster in most tasks than the base M2. Eventually (next year?) there will be M2 versions of those higher performing chips and they will be integrated into the computers with the M1 Pro/Max/Ultra.
Branding wise it is every confusing. They'd have to explain that that "2" doesn't mean what most people will believe it means.