How much do you think one of these spankin new cards will cost?? ~$600 maybe??
$599 seems like an R600 target, and $499 seems like a G80 target, but everything hinges on WHEN they are launched (Xmas buying time [Nov to early December] you can charge a premium, after less so.) and what the comeptition looks like and is priced like when they arrive. If the R600 performs poorly and only matches the G80's upper low top end, then nV has the pricing reigns and ATi needs to drop, inverse for the reverse, although there'd be less pressure if these pre-launch rumoured prices are right since there'd already be a discount. However if they're cut-throat close like this last generation then prices may fall quickly over time depending on availability. And that's the last factor, if these cards are few and far between then the prices will go up, and may be at a premium above the MSRP, like the GF6800U, X800XTPE, GF7800GTX-512.
Short answer know one knows until they show fo' sho!
hahaha of course again the price/performance law will apply, also availability. I think, if theyll be here before xmas, it wont be the time to buy. Definetly a good DX9 with a nice xmas discount, but not DX10. After xmas the prices should drop a bit, when mass production will have catched up with the market.