There is a report according to Appleinsider at the WSJ that says the tablet will support multiple users and be user aware via facial recognition and the camera.
This does not come as a surprise to me and I suspect that this is definitely a feature we will see.  I expect to see it appear in [...]

Apple has rented a stage at the Yerba Buena Center for the Arts and is rumored to be making a “major product announcement” on January 27. Many Apple insiders are confirming it will in fact be the new iSlate Tablet that gets the focus.  Jaffray analyst Gene Munster gives it a 50 percent chance of [...]