Core Image - do I need it?

I'm thinking of making a few upgrades to pep up my 2001 Quicksilver 867MHz.
My present graphics card is the OEM GeForce2 Mx with 32MB VRAM installed the 4x AGP slot. This card does NOT support Apple's Core Image. I don't really understand what Core Image is all about. Some of Apple's info suggests that if my video card does not support Core Image, then displaying graphics requires more CPU power under Tiger.
I do not play games which require high frame rates (I do play the Myst series, up through IV - but I doubt it is taxing my video card). I also do Photoshop and iMovie/iDVD, but nothing major. Most of my iMovies have been from stills, not video.
My question is this - would there be any advantage to getting a video card which supports Core Image for a non-gamer who does not do heavy duty video editing? Should I expect to see any improvement in general 2D responsiveness if I had an updated video card?
Thanks,
-GW
Quicksilver G4, 867 Mhz   Mac OS X (10.4.7)  
Quicksilver G4, 867 Mhz   Mac OS X (10.4.7)  

Mostly, core graphics just makes things faster, but there are some functions that require it. e.g. adjusting the video (brightness, contrast, color) of DVD player or QuickTime movies.

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