“Hollywood pushed 3-D in the 1950s and again in the 1970s and 1980s, but those efforts left moviegoers with little more than a headache. While the 3-D technology on display in films like “Monsters vs. Aliens” is more sophisticated, it remains to be seen whether people will still be drawn to it after its novelty has worn off. Many theater owners say they wonder if it makes sense to raise ticket prices more in a downturn. And the technology, which relies on actually going into theaters, may have little effect on home-video sales.”