Really that depends on what you think is a "super-phone." The Atrix is currently the only smart phone that can be connected to a docking station or a notebook dock (both made by Motorola) which turns the phone into a full fledged computer.
However, reviewers say that it's overpriced, the docking port and notebook are equally over priced, and once the phone is connected to the notebook dock it is only a mediocre computer at best.
From what I've been seeing it may well be an experimental offering since manufacturing costs are almost certain to be made up with a few thousand sales. Easily accomplished even if the phone is a flop.
You can read a full review here. http://hubpages.com/hub/Motorola-Atrix-4G-Smartpho...