The current DSi screen is 3.25 inches. Rumor has it that Nintendo will be releasing a new DS with a 4 inch screen. What would that look like? Time to bust out the ruler and additional screen.

This perhaps. Below, a fan drawing show how much bigger two four inch screens would make the DSi.

It's like a small laptop!

Let's compare it to the DS Lite.

It's much bigger!

任天堂、4インチ大画面の新型ニンテンドーDSiを年内に発売か [はちま起稿]
ニンテンドーDSが4インチになるとこうなる<図解> | インサイド