As of tomorrow, Nvidia plans drop the prices of Geforce GTX 280 and 260. The reason for this sudden price cut is that the cards are not selling as well as Nvidia expected. The second part of the story is that Radeon HD 4870 ended up better than Nvidia had hoped.
Nvidia will cut $90 of the Geforce GTX 280 price-tag, but this is Nvidia's price to partners and we are not sure just how much will this affect the suggested etail price. We are sure that end user prices will also drop but probably a bit less than $90.
The Geforce GTX 260 will be $30 cheaper to partners and Nvidia will only offer limited price protection which means that some partners / distributors and stores might end up with some overpriced cards at their warehouses.
Many people wont be happy but as of tomorrow GTX 280 and GTX 260 should be cheaper.