Did you sleep through yesterday?
JK
Yes the beta has been out since yesterday for developers. Public beta in July.
Of course, as happens every year non-developers do manage to instal the first few betas - this year, they're in for a treat as doesn't seem to be any show-stopping bugs and performance is indeed 'snappy' and battery life seems OK so far.
I have the betas on iPhone 12 Pro, Apple Watch 6, iPad Pro M1 and a MacBook Pro M1 and am surprised how well they perform for a beta 1. I expect at some point before public beta we'll hit the usual performance regressions as Apple work through issues and test various features.