3D Screens about to be stretched thin
According to Pastapadre, the increase in 3D movies means more and more screens will have to be added with the technology.
The cost of converting, being upwards of $100K per screen, has caused hesitation in the past with uncertainty that it would be worth the investment. However leading up to the release of Avatar (and now especially after its success) theater owners have been making a more concerted effort to meet the oncoming demand. About 250 screens are being added each month.