Lol, its funny how the tables are starting to turn...More and more people are going to ATI, and going away from nvidia.
Nvidia used to be the prasied one with their good line of cards. etc....but now with all their poor drivers, and poor performence mid - low range cards lol and bad quality (lifetime of cards) they are going downhill fast.
ATI used to make the cheap cards that did poorly in the gaming market...but now, well they are producing better quality cards, and taking the lead over nvidia...
However thats not to say that "LETS ALL GO WITH ATI" lol, MY PS3 has a RSX as GPU, its made by Nvidia and Sony...Just becuase its made by Nvidia doesn't mean I hate it. (I don't want my PS3 to die lol). So far its lasted 3 yrs and still going... Its around the performence of a 7900GTX. My laptop is 9600M GT. It never failed on me, and plays all the latest games...
The Two companies I prefer when it comes to computing are Nvidia (GPU) and Intel (CPU). Although these may change in future.
Here are is a steam survey, about how many people use which companies GPUs, and CPUs...enjoy!
BTW, Nvidia and Intel still dominate the computing market today...
Steam Hardware Survey