Well, as goes entertainment, I think when applied to the right types of films (Avatar, UP) that being animated films, or so called 'spectacle' films, it can really improve the immersion. I enjoyed Avatar in 3d more than 2d. As for the supposed health risks, I think what should happen is that 3D should remain in the cinema until they can ascertain that it's safe, and keep it out of the homes and gaming until then. Perhaps for a while, actually, since I've always seen it as more of a cinema thing than anything else. I couldn't watch a film in 3D in my sitting room.
Might as well be cautious. Still, it doesn't sound like there's much of a danger.
Strangely, I think I might be one of the few on this website who genuinely enjoys 3D, and would like to see it in more films, as long as it's appropriate of course. It shouldn't replace 2D though, as a lot of people get headaches and motion sickness from it. I don't though, so I can happily watch it.
It's still very expensive though, and definitely should only be voluntarily restricted to films that it would suit. It looks terrible when they convert films to 3D though, it really does. The technique they used for Avatar is really the only way to go.