Comment by ssl-3

Half is half.

If we halve waste-heat generation for a practical widget enough times, then we won't need liquid cooling for that widget at all. If the trend continues and gets good enough, then maybe we can get all the way to a complete passive-cooling snoozefest.

That's pretty boring, but boring is good. The systems we use every day without a thought because they boringly Just Work are, perhaps, our greatest successes.