The sources predict that even products that only support Vista basic may quickly fall out of favor in the market as consumers are likely to be more eager to experience the full multimedia functions promised by Vista.
For the desktop enthusiast, this might be a great thing. If you are looking to build an older machine that won't be requiring Vista, prices may be so low that doing such, even with new parts, is dirt cheap. I for one am looking forward to hardware prices dropping. It's unlikely these will affect CPU or RAM pricing, and won't change the prices of newer hardware.