This has been coming for a while. Today Apple has formally announced that WWDC 2020 will start on June 22nd and that it will be a digital first conference. I am excited to see what a digital-first conference will look like. It looks like the majority of interaction will take place through the Apple Developer app, which is not available on the Mac. I expect they will have a web based alternative by the time June rolls around.
If we’re lucky we might be able to have some form of viewing parties by then. Fingers crossed!