I suspect you'll see more and more motherboard advances in temperature-based fan control. This is the simplest place to add complexity. Use a larger louder fan in case exhaust and on heatsink but allow it to be throttled down in noise when system is idle. We are starting to see this in some newer motherboards but I will boldly predict it will become much more important. MOST people don't keep CPU at 100% load all the time and so this kind of solution is smarter and cheaper than elaborate quiet cooling to accommodate the few that do.
No one is mentioning GPUs and honestly they are a bigger problem. There's just not enough real estate to REALLY cool 50+W down between AGP and top PCI. Some rather elaborate solutions (Abit OTES, Zalman heatpipe thing, etc) are being released but will these be enough in a few years if GPUs are pushing 70W?
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