So, I went and bought a 3DS.  I wasn't meaning to buy one; JE asked to see one in the shop, and I was so impressed by it that I though "Screw it, we need another DS so the boys don't fight over it.  This will do!".  It's very impressive.  I like it a lot. 
 
Not many games for it, and out of the choice of 6 to get with the machine for free, I went with Rayman.  Not played past the intro movie yet, but I can assure you that it's in 3D, I can see the 3D happening, and it doesn't hurt my eyes.   
 
And I took a 3D picture in the McManus gallery.