DSI XL and LL?

Ok even though I haven't been on the forefront on Nintendo tech... I have to scream WTF Nintendo!? This is a new version of the DSI that and I qoute:
"A new iteration of the Nintendo DSi™ system will be introduced in Japan on November 21, 2009," according to a statement from Nintendo released to Kotaku. "To be known as Nintendo DSi LL in Japan, and as Nintendo DSi XL in North America and Europe, it will offer a screen 93% larger than the current Nintendo DS Lite with a better view angle, an additional longer touch screen stylus, and preinstalled Nintendo DSiWare™ software. The new version will arrive in North America and Europe in the first quarter of calendar year 2010."

Again I wonder why Nintendo perceived this as a necessary action.