Ah, 3D. Because everyone wants to have a headache if it's poorly rendered.
Personally, I think 3D is a cool option for a tv/movie, but only if you can turn it off in the settings. I've gone to see Avatar, Alice in Wonderland, Clash of the Titans and How to Tame Your Dragon all in 3D. I had a headache a few days after each movie and felt kind of sick after walking out of the theater (no, it was nothing I ate).
Yes, 3D is cool. But not all the time. Immersing yourself like that is more trouble than it's worth if you have bad eyes (more than likely, if you grew up a gamer) or have a head condition or something. I myself kind of scoff at the concept of the 3DS, but i'm still wondering if they'll pull it off well.
The DSi is still recent,and the XL is still in the process of being released (correct me if I'm wrong, but i haven't seen any actual units for sale in my area, just displays). Do we really need another unit hot on its heels? Really? Just my opinion.