Also depends on if the other company made him an offer he just couldn't refuse. If he's leaving for another job, obviously the barcelona launch will have zero impact on the current job he's leaving for.
Of course, if he's taking a pay and power cut in the move to the new job, that might be an indication he had little faith in Barcelona.
Until we have more details on what his new job entails as well as the benefits he'll enjoy there's it's hard to say if the motivation was just looking for a new challenge, better pay, a hostile work envirionment (stockholders looking for a scapegoat), internal power plays, or what have you.
On that note, has anyone heard any rumors about where he is headed? The memo's mentioned a move into a different field, so I'm guessing CPU and graphics are out. So no Nvidia or Intel.