Quote: "Surely getting the graphics card to render the view projected onto a curved surface is a lot less efficient than a onto a plane."
Curved has nothing to do with the graphics card, it's just a screen made up of 4 projectors beaming at a curved canvas (from behind).
Quote: "Seriously, why is this important at all considering the human eye can't detect anything faster than 1/30th of a second?"
This has nothing to do with the human eye but how fast the screen can change from 1 picture to another. You won't be able to tell a lag of a few milliseconds (like on a 16 ms LCD) but the image will become blurred when you for example rotate a camera in a game.
Quote: "Also I find it slightly hard to believe as almost all monitors these days are either 2-3ms, surely it must be .02 seconds response time."
That is an LCD monitor you are talking about. The problem with an LCD is that it takes time for the crystals to change shape and permitting different amounts of light.
DLP uses tiny mirrors to reflect light and they turn on and off rapidly to produce varying amounts of light. As you can see there's a huge difference in speed here.
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