if you had the balance board from wii fit you can do that fake walking on it to move your character! then to pick stuff up or what ever just lean over or crouch and the character will do the same, to look around corners you can lean to the side, to rotate you could use the analoge stick or something. Its not impossible, alot of actions and programing involved and it would require you to get up off your chair and alot of people wouldnt like that but thats not to say it isnt possible.
in regards to a 1:1 motion capture this is my opinion
Wii boxing works on the rotation of the remotes to regonise where your hands are. As you move your hand up naturaly the wii remote tilts upwards and so the game moves the characters hands with the tilt of the remote but us users are thinking its capturing our relative movement. As the remote finds its neutral position based on gravity it will also be able to regnise a foward and back movement, or side to side movement no matter what position the remote is in. You will notice in Wii base ball that you can wiggle the remote around while waiting to make a swing and your mii will riggle his bat exactly the same
In wii play you can jump your cow in cow racing by popping the wii remote up even while your accelerating, stoped or turning, so the remote can detect up and down movements at any angle.
All this can be done without the pointer device as the games that use these techniques have allready been made and dont need the remotes to actively work with the TV. It would be a simulated 1:1 motion that makes the user think its capturing their every movement.
But if you wanted you can use two wii remotes and use the IR sensors and everything can be done through the pointers. Then you have a much simpler and perfect 1:1 motion/pointer set up like the fishing game in wii play but all I'm saying is that with a bit of thought its possible with the nunchuck combination and easily possible if you duel your wii remotes.
If at first you don't succeed, you fail
