bling, not from nVidia, not without pushing, they have too much invested in 64 mobo chipset silicon, their mobo outfit are in my experience (esp driver wise) ruthless and incompetent, not a good combo. They act like a 15 yr old with a new bb gun.
ATI is going the same way but as yet has more to gain from AGP upgrades rather than skewing the entire market to leverage its mobos, so I guess ATI will push nVidia into the AGP frame, but who will keep an eye on ATI ?
I expect the nV 7800 AGP parts will arrive close on the heels of the ATI 1800 parts widely predicted. At this juncture I dont think its cool to have GFX makers making mobo chips.
As for generations, worthiness is a matter of bang for buck when you are upgrading from several generations ago. I am amazed that the best middle range PCIe today
6800GS can only offer 100% over my overclocked 9700 which still pulls over 5000 on 3dMark03. As for mid range AGP, its a bit of a damp squib at the moment I have to say, the 6600GT is not a big help though at least it has SShader3, but the functionality and speed of an ATI 1800 part might draw me in. The top parts are IMHO overpriced, I remember I was upset when I paid £250 for a Geforce2 top of the line, personally that is my ceiling, evidently not everyone's. Its a free market!