[color:"orange"]my guess: the interaction with items <img src="/ubbthreads/images/graemlins/tongue.gif" alt="" />[/color]

That is what I took it to mean. If you see a chest, you can open it, it is not just painted onto the background. I liked in DD/BD that you can move chairs and plants, light or put out candles, fill empty mugs from a beer keg, etc.
I played the Sacred demo and most of the chests and barrels could not be opened; I found a large pentagram in a house, and tried to light the candles to see if anything would happen, but couldn't interact with anything.

[color:"orange"]i wanted to put it in my inventory but accidently used it, altough i dont know how you could change that.[/color]

The game could use Ctrl-LeftClick (or Alt/Shift) to pick up an object regardless of the default left click action, or have a hotkey to pick up all nearby objects.