The next Nintendo console, casually called the Wii 2 by speculators (or Wii HD — it changes every week), is expected to be announced this June at E3. The big selling point, as people hear it? A controller that features a 6.2-inch touchscreen right in the middle.
There are certainly a lot of options for how a large screen like that could be used in games, with it potentially acting as a map/inventory screen, an extension of what's on screen, or a space for minigames. The options are pretty limitless. (Anyone remember the Dreamcast VMU? -Ed)
This controller won't kill off the motion-sensing Wiimote, but will be an additional option along with what will probably be an upgraded version of what Wii users are used to now.
We'll see it all in full detail in June, hopefully.