First of all.. The Sun has ZERO CREDIBILITY!
have you any idea how they reported the Hillsborough Disaster [http://en.wikipedia.org/wiki/Hillsborough_Disaster]? They printed UTTER LIES that football fans had attacked police, held up paramadeics (for no reason) and even urinated on the piles od dead bodies following the lethal crush.
Nothing of the sort happened, The Sun officers were flooded with reports that the Football fans had pulled together to save lives and assist the authorities in every way. They printed it out of disgusting defamatory malice.
Even 22 years later NO ONE in Liverpool reads The Sun, there are no subscriptions there and no shops carry it. If you are caught reading one there don't be surprised to get a right good hiding for it, you would be looked at by some the same way as if you were reading Mein Kampf.
People outside Liverpool who read The Sun are completely mislead, they utterly depend on these shitty tabloids to tell them what is what.
The Sun are professional trolls, their paper is not worthy for your dog to shit on.
But even beyond their shitty and well deserved reputation; a "scientific" test with no mention of a control. How do we know it wasn't the very fact of playing the games rather than the 3D effect that was causing this response? And what is this supposition that a raised heart rate WHEN BEING ENTERTAINED is a medical concern?
I have used the 3DS, IF you can find that sweet-spot in terms of distance, angle and parallax then it is fine. If is annoying but this is typical scaremongering troll tactics to say it is ANY risk to your health. Don't be surprised if The Sun is petty enough to "demand" that this be banned in schools and certain shops they think are "pure".
Fuck. These tabloids, I really wish Americans knew how they are feeding the trolls by covering this.