Nintendo's Mystery DS Portable Revealed
Yes this was along the lines I was thinking also. I think its a really innovative idea that could change the way we think about games.
The thing that Nintendo is leveraging is the fact that they have complete control over the display medium. Dual display traditional consoles would not be very sucessful. It would require the end user to first have two displays, and then physically orient them in the correct manner for the game. I have a feeling that very few people would actually do this. But if the games for your console are designed from the ground up with two displays in mind AND every console produced has two display built in, we could see some revolutionary things.
Or it could just be gimmicky trash - we'll have to wait and see =]