Nintendo is no stranger to dual screen gaming it just seems to make sense that some of the touch screen magic might translate to the next Wii since Nintendo has found so much success with it. So they could have a regular refined Wiimote for the next generation console to play future and current Wii games and then have it fold open for people to use a touch screen when the application/need arises.
The best way to sell games is to sell hardware and the best way to sell hardware is to make the system accessible, which they have done. The next best thing after that is to make the system useful. It could help them to launch an application store which ought to help reduce the number of hacking attempts and at the same time take advantage of the fast growing usefulness of smartphones by making it possible to use smart phone style applications with the console.
Beyond usefulness they can open up new ways of playing games and new ways to interact with current genres and pre-existing game types. With the Wiimote open, it'd probably look quite similar to the bottom of the DS clamshell, and that gaming mechanic does seem to work on the small scale with the DS so why wouldn't it work on the larger scale with the Wii 2?
