Why should one buy a new video card?

[Veleno]

I all,
I have an old ATI 9000 card but i can see bump, specular, ecc..
With latest cards, what can i see?
Could someone post some screenshots with best/new features?
Thanks!

[Evil Dr Ganymede]

Take a look at this thread:
http://www.celestiaproject.net/forum/viewtopic.php?t=5930

if you get the newest cards, then when the new version of Celestia comes out you'll be able to see the things that Chris mentioned on page 2...