I also think that, prior to this, Apple was running into a problem of being unable to know when they were talking to developers and people in general, as we saw

I also think that, prior to this, Apple was running into a problem of being unable to know when they were talking to developers and people in general, as we saw with large parts of the iTextbook presentation. With this model, the developers will get their news in the same manner as always, and the keynotes can be reserved for a general audience.