Sony's Hirai: Naked eye 3d tech for portables does not have high precision.

[chriscox1121]

to be honest he really doesn't say anything bad about 3DS.  he just saying from his experience the tech wasn't there.  Nintendo obviously found something there.  He makes a distinction so that people don't think he blasting the 3DS tech.  Which, he prob wouldn't do considering all the positive press.