I would much rather have an underclocked CPU and have decent battery life than a super-fast CPU with the N810's battery life. My phone must primarily be useful to make calls. It absolutely must have the capability of being stretched to 2 days at an absolute minimum and preferably 3 without charging if I go easy on it.
If a faster CPU would make that impossible, I'd rather have a slower one, as my phone is primarily a phone. I do like when my phone can do things tablets can do as it saves me from having to carry them both most of the time, but sacrificing the usefulness of the device as a phone is simply not acceptable, no matter how much some whiners think otherwise.
Having to carry an extra battery or extra device because my primary phone can't make it through the day is the true failure.