Nintendo saw a 29% drop in sales from their last financial year, but continue to forecast promising sales for their platforms in spite of two of them in decline. Iwata said Nintendo expects to sell 13 million Wiis for the rest of this fiscal year, plus 11 million in DS hardware and 16 million 3DS. The older platforms are expected to continue a nice trend mainly through sales of Nintendo's long-standing bestsellers like the New Super Mario Bros. series.
During a press conference before the actual briefing, Iwata made to the media regarding the Tohoku earthquake disaster's effects on Nintendo's business. In general, he doesn't see game system sales improving in the country until autumn.
As for the 3DS, the events of the earthquake naturally slowed the sales of the handheld and its games and likely contributed to overall sales coming just under Nintendo's forecasts (though obviously, Iwata didn't entirely blame the disaster). Iwata called this a sort of "starting from zero," suggesting that a renewed marketing campaign for the 3DS might be in the future.