Why install this driver?

Your NVIDIA video card will work on your Fedora 11 box without this driver, however if you want to enable the 3D acceleration (if you want to use Compiz Fsuion) you need to install it.
Which driver to use?

The latest nvidia driver: This is a proprietary driver that works with newer nvidia cards.

One month ago Nvidia released their 180.22 video drivers for Linux OSes, which brought initial support for Linux kernel 2.6.28. Last night (February 11th) Nvidia proudly presented yet another improved version of their proprietary video driver for the Linux, FreeBSD and Solaris open source operating systems.

If you want to install Nvidia drivers in Ubuntu Feisty and above versions is very easy to install.Ubuntu doesn’t include Nvidia drivers in a default installation for a number of reasons.

"Envy" is an application for Ubuntu and Debian written in Python and PyGTK which will: detect the model of your graphic card, download the right version of the proprietary driver for your ATI or Nvidia card from ATI or Nvidia's websites, handle the dependencies required to build the module, install/uninstall the driver, set up your xorg.conf for you, and then restart the Xserver for you.

They have even criticized Nvidia specifically for not releasing free drivers. Nvidia responded.

I was user of nvidia video card and I was happy to use it in F7 and F8 but unfortunately I replaced that card with a newer one. That time the card was ATI. Of course I did not check if that card is supported in Fedora 9 (I have to blame myself) and just took it. Recently I noticed the news about that how "open" ATI would be in the future. And now I experience their "openness" with my computer.

190.25 (beta) is currently under development and most notably it brings support for OpenGL 3.2.

If the graphics card is not supported by default (Nvidia or ATI propriety drivers), then the Live CDs do not boot normally. Both in case of Ubuntu and OpenSUSE, the users have to use alternative methods.

A month ago NVIDIA had introduced the Video Decode and Presentation API for Unix (VDPAU) that brought PureVideo-like features to Linux. Our initial benchmarks of this video decoding API within NVIDIA's binary driver were quite favorable as it was able to dramatically cut down on the CPU usage when playing H.264 video files.