Quote from BigFunky:
The new connectors on the 450 are called 'DisplayPort'.
http://en.wikipedia.org/wiki/Displayport
They are basically an alternative to HDMI. A lot of the really big new monitors have a DisplayPort input, particularly Apple CinemaDisplay which only have DisplayPort, and the new dell 30"s have both DisplayPort and DVI.
Unfortunately they are not directly compatible with DVI or VGA, so the adaptors are quite expensive, around $80 each. Which would make the 450 a bad option.
You think perhaps Nvidia would not include the adapters? Maybe not, I was just thinking they would.
Regardless, I'd choose something else for any new rig... like an x38 mobo and 2x, FX570s if planning to run 30"ers.