Well, yeah, firstly, it's just a rumour. We still don't know if it's true or not.

Secondly, if it's really true, then it depends on what additional features this rumoured new DS will have to offer. If all it offers are just bigger screens, well, I'm pretty sure it'll be a failed project. Redesigning a new version of the DS purely with cosmetic issues in mind isn't a wise idea anyway.

Though obviously Nintendo wouldn't be that stupid to waste resources on manufacturing and marketing a new version of the DS that just looks sexier in terms of physical design, but has no special additional bonuses. Or would they?

Thirdly, like one user pointed out, if bigger screens also mean bigger DS sizes in general, then it defeats the concept of a DS Lite. Failed project, too.

By the way, I've never upgraded my ordinary DS to a DS Lite.