For anyone who's complained about nVidia drivers missing features (like TV specific ones, for example), take note of the freshly released 174 drivers. It only officially supports the GeForce 9600, of course, but look for a more global release soon, or get the modded drivers from Guru3D if you're feeling ambitious. New features sound great--though I haven't tried these out myself:
What’s New in Release 174
• Added the following pages to the NVIDIA Control Panel:
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Manage Custom Resolutions
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Adjust Television Color Settings
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Adjust Screen Size and Position
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Move CRT Position
• Added the following new Pure Video HD features for the GeForce 9600 GT:
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Dynamic Contrast Enhancement
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Dynamic Blue, Green & Skin Tone Enhancements
• Per‐display controls for the video settings in the NVIDIA Control Panel
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Dual‐Stream Decode Acceleration.
Also interesting is what's noted as permanently dropped:
DVD/MPEG Extensions (such as was provided with Windows Media Center Edition)
• Audio Extensions (such as was provided with Windows Media Center Edition)
• Microsoft Windows Vista Aero display mode compatibility for Blu‐ray & HD DVD playback