As a standalone phone, the Motorola Atrix competes well against the dual-core Android competition due to its high res screen, unique fingerprint scanner, great battery life and comfortable form factor, though is let down by a mediocre camera, some unnecessary interface tweaks and limited video support. As such, it rather depends which you prioritise.
Add in its dock accessories, though, and it shines out brightly. There is something undeniably cool about having one device perform so many of your daily functions. Unfortunately these docks don't come for free and the lapdock in particular simply can't compete for functionality with a laptop, netbook or even tablet. If and when Android updates come that more comprehensively support it then it could be amazing but as it stands, it's a nice to have, not a must have.