It's a mix of Twilight's detail with Wind Waker's coloring.
This is the very same thing I was thinking when I saw it.
I'm glad Nintendo had a strong showing this year. As much as I'm tiring of their numerous iterations of handhelds (I was actually considering upgrading from a phat to a DSi XL until I heard the first rumors of a 3DS), the 3DS may very well be a day-one purchase for me. It'll be tough to resist the urge to buy. Possibly even more amazing than the 3DS itself is the number of publishers who are developing games for this thing. Never dreamed of seeing an RE or an MGS on a Nintendo handheld.