A thread on the official support forums confirms the problem: many owners of the new MacBook Pro are complaining after seeing their computers crash when doing some complex task , and not being able to use the mouse, trackpad or keyboard to try and fix the problem. However, tests by these same users have confirmed that when the system hangs up it can still be accessed using an SSH connection from another computer.
The failure could be either the processor, the graphics core or the notebook component power system. Apple has raised the priority of this issue to provide a solution in the form of a software update as soon as possible. For the time being and if you are unlucky enough to have this problem, it is best not to run many applications at the same time if you are doing something that requires a lot of effort on the part of the MacBook Pro.