From the looks of that shot, it seems that the new DS might be slightly better for viewing the screens at an angle, which would be good.
I'm very tempted to get myself a snazzy black lite as a replacement, and I've never bothered with redesigns before (stuck with my old GBA through think and thin).
EDIT: Just noticed, the power button has gone back to being a switch on the side. Now that's old-school! \o/