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by function_seven 5543 days ago
You're probably correct in saying that glasses won't disappear anytime soon, and it is impossible with eye/head tracking alone to achieve stereoscopic 3D, but I'd like to bet that sometime in the future a holographic display could be created. One that sends different images to different regions of the room, such that your left eye is literally seeing a different view than your right eye, without shutters or polarization to mimic it.

To truly get there, you'd have to actually change the path length of each ray, to allow your eyes' focus to agree with their convergence (a common complaint with current 3D, where the eyes are forced to focus on light coming from 3 meters away but converge on an object thats "1 meter" away.)