I was thinking the other day (which is always a bad sign ), and I came up with an idea for a really cool gaming system.
We have virtual reality stuff (I've never actually used this, but...)
And we have the Wii.   
put one and one together and you get: totally awesome games where you actually run around, etc.
It would be like Wii (physically active and stuff), but so much cooler.

that would be cool, but it better be something where you don't have to run around. Otherwise,  the audience would be very small. I myself live in appartment and while the living room is not too small by appartment standards, it is barely large enough to play Wii games.

are you suggesting a mmorpg like runescape?

Basically its like the Matrix, which i think would be totally the coolest thing ever!  Too often in games i wished i had the field of vision i did in real life.  Too often i wished i could hear as well, being able to actually track people better.  And too often i wished i could do things that would be physically possible, but not in the constraints oft he game.  Making a full on Virtual Reality would be the awesomest thing ever to come to video games!