Nvidia hands over the reigns as the top dog in graphics to AMD, thanks to recent second quarter domination by ATI. Nvidia is still learning how to deal with a recent contract loss to Apple, while at the same time, phasing out their chipset business. These things along with simply not competing on the mainstream market with ATI has killed them.
Maybe they have something up their sleeve, but nowadays even the former die-hard Nvidia fans from recent years are currently sporting ATI graphics cards in their newer builds. Why? Because Nvidia has decided to only support all the latest graphics technologies in their overhyped and overpriced graphics cards. At this point the market share is still pretty close to 50-50, but if Nvidia doesn't start coming around we could see another 3dfx-type fallout in the graphics industry, and none of us want that.