Then go bother display manufacturers. The LCD and related parts consume well over half of the battery of a notebook computer. Current processors draw so little power that they're not even in the top three anymore.
Actually, LED screens are supposed to be much less power hungry. And they're supposed to be just around the corner. So that part at least might get solved. Then again, I'm quite disappointed by the rate of innovation in screens and even more in batteries... we were supposed to have batteries that ran for 48 hours by now according to various optimistic reports a few years ago, Toshiba even made a prototype model... then it all died.
Anyhow: how about waiting till 08/09 for a laptop with: new form factor + Nehalem + LED screens + SuperBattery + OSX 10.6 Lion