http://www.youtube.com/watch?v=cNu4CluFOcw
Looking nice

Very nice
Soon, DSi will be able to do this as well

neat ^^

stupid question though, why's that thread in hilbert's?

Thats really interessting.
Some time ago ive seen a similar technique using a 3D-Helmet with which you could explore/see ancient ruins of...i think it was Heidelberg...while moving through the real city.
It showed the real enviroment while walking and blended in the virtual enviroment when you stopped moving for a while.

In fact this could be the future of gaming - just imagine an empty gym in which you could play every game moving through the real world. So a lot of genres would be possible e.g. adventures, shooters or training simulations like a driving school simulating difficult traffic situations while driving in an empty area. Kind of a Wii 2.0

But how to realise collisions? I mean if there is a building in the virtual environment, in the reality ther is none. So how to stop the real player there?
And what about the real walls of the gym? You will permanently walk against them

Well the real walls have to be also 'virtual walls' - so you know where u shouldnt run into.
Collisions...good question maybe walking through a virtual wall just has to end in a game over.

ELECTRO-SHOCK, for breaking the rules, and vision turn blank so you dont "see" what in there.

Nice video. Thanks for sharing.
I should go to sleep after all this walking. :P

His back will start to hurt after a while... the actual game / thing better have a zoom option.

Looking cool though, although not graphically that impressive yet.

Yep: you're sitting on the high chair, looking on the city from the top with the help of zoom, drinking beer and killing zombies... sounds great