Uhh, I personally dislike 3D movies because they often give me headaches. >.>
However, I may get the 3DS just because of the new cartridges, and also because I like to have 2 DS's at a time so I can trade with myself.
But because the 3D on the 3DS is glasses-free, maybe the effect will be easier on my noggin. @___@
We'll have to wait in see. I'm very interested in exactly how the 3DS will work.