I don't think the prices will really drop, but I think we'll start seeing more 400-480 watt OEM (and no-name) power supplies. After all, you can avoid the PS problem by getting a X800 . Nvidia has lowered the power requirement down to a "quality 350 watt" as opposed to the 480 watt they originally specified. I figure a "quality 350 watt" is about equivilent to a 400-450 watt OEM PS.
-Scott