I tried the Schedule tab today, I clicked "Notify me" on an upcoming stream of a friend, and the notification was almost the same as the usual follow notification that you get every stream. Since the schedule is a relatively new feature and you can follow specific streams (instead of the whole channel), I thought it would be great if I could pick "Notify me X minutes/hours before the stream". Some of us like to arrive first, and/or prefer to have notifications in advance.