This article was completely devoid of useful information. With 3D displays becoming so common, bordering on the pedestrian, explaining the technology behind them does no one any service. The important piece, the haptic feedback, you simply gloss over with a dismissive, "it's there."
This is hardly surprising, as this in not really a news article, but merely a rehashing of another article from the UCSD news center, which itself did not go that in depth into the device. But how is this an excuse for not doing even simple, basic research?
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