Now, the Oculus Rift is something I'm keeping a very keen eye on, since it appears to be much more immersive and much less expensive than a (completely unaffordable for me) triple monitor setup or similar.
If the DK2 is around 350USD it might not be unreasonable to expect a finished product around 300, which wouldn't be completely horrifying.
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One thing that I haven't been able to figure out though is how (and if) the Oculus Rift deals with needing to war glasses for shortsightedness.