I don't really see the point behind all the speculation and the like, especially considering all we're being shown is the model itself, no content or anything.
But I guess if I do have to comment on something - it isn't matted like the DSi. Which is a shame since it will become a horrible fingerprint and dust magnet, especially if you get one of the darker varieties (which I usually do).
Although I've heard it does have the DSi's clicky buttons rather than the Lite's mushy things which is great.
I'm very weird for noticing these tiny things most likely but yeah, they do make for a better product. Sorta.
And it looks rather chunky... Almost inevitable that they'll release a 3DS Lite at some point.
But the games are what matters, really. I am a little confused by how they're manufacturing something, with all of its internal bits, which doesn't actually work properly, unless that's added at a later stage of development.