@Mor - I think more and more galleries are interested in this kind of interaction, because people like it. I haven't been to an art gallery in a while that didn't have some way for people to "contribute" even if it was only writing something up and sticking it on the wall.
Quite a few museums seem to get into this as well. One I went to recently has an area where people can take photos digitally and put them up on a wall using a projection unit and interactive software, blending them in with other objects from the museum. So, they are helping to create a display and history.
I've also seen digital artworks on screens where people can interact with them, like "touching" various things on the screen to move them, or whatever.
But my favorite is when people go even further and make a whole game designed around an artistic concept. If they do it well, it can be amazing and beautiful at the same time.
I really think that is one of the things that we will see more and more as time goes by, the blending of video games and art.