>>313993821
>slightly moving your hand over the allocated zone makes it disappear ingame? 
no, it doesn't and it can be pretty big.
You seem to just want a dynamic playspace, which in theory sounds great, but are you really gonna go to an open field every time you want to play? probably like 90+% of the time you'll use it in your room
Since steamVR is a much more open system you can add your own accessories (vive pucks, etc), you could have anything in your playspace tracked