The NV30 aka GeForceFX should be officially announced at Comdex on the 18th Nov. US time. IIRC the card will be available for sale on 18th Jan, give or take a few days, at a price of US$360+. nVidia are claiming a 30% performance increase over the R9700 Pro, but that's marketing for you.
Speaking of marketing, I'd probably have more respect for the Parhelia if they hadn't marketed it like they did. Official sources stated (in Matrox support forums for example) that the Parhelia would outperform the GF4 Ti4600 in the 3D market - when the card finally made it to the review benches and failed to perform as such, everyone went back to stating that it was a card for "professional" users. It will still run games fine, probably about as well as the targeted users would want - not everyone wants GF4 performance (like me, yet...), and pure gamers make up the vocal minority of the video market.