You'll be able to ask it to make a note, play music, set a reminder, and lots more without ever logging in.
The point of logging out is to deny functionality of the computer to others. This is going to take the Windows mantra of trusting everyone-bar-the-owner to a whole new level.
C'est magnifique, mais ce n'est pas l'Informatique. -- Bosquet [on seeing the IBM 4341]