You'll talk to it like a little buddy. They won't make them too anthropomorphic because that shit's creepy, so they'll go with something cute like this. It will be invisible unless called on, and then it'll pop out and become a little virtual display for you.

http://www.neurdon.com/2013/06/21/service-robots/#more-3519

http://fc07.deviantart.net/fs71/i/2012/216/f/e/zelda__navi_by_ddbabygirl13-d59shar.png

http://fc03.deviantart.net/images2/i/2003/52/3/9/Pokeball_Opening.jpg

(http://www.autoadmit.com/thread.php?thread_id=2323922&forum_id=2Vannesa#23744451)