3D is expected to take 9.2% of the total display market by 2015
Display Bank recent release an interesting forecast of the 3D display market. It looks pretty comprehensive. Here's an excerpt.
The biggest issue in 3D display is to develop super high resolution display to offer real sensation and resolve visual fatigue which occurs when observing the display for a long period of time. Specially, 3D display TV market is expected to radically expand when digital broadcasting is imported to generalize HD and Full HD grade TV's and when the resolution and visual fatigue issues are resolved. The 3D display market is likely to further develop through various 3D contents development and 3D standardization.
You can also order the full report which includes coverage of various 3D/stereoscopic technologies.