Earlier quoted context omitted.
"too much memory consumption" is pretty low on the list. The reason it isn't high on the list is because they already tackled that for Win7. You may not remember, but it was a growing problem before 7. They aren't saying here that they need to reduce memory consumption further; they are saying that they will do the same thing with battery life for Win8, that they did with memory for Win7.
I think you've misunderstood my point which was that Microsoft engineers are very capable of reducing memory usage if charged to do so (and, as you say, history bears this out) and that I would expect them to likewise be able to reduce power usage [within the constraints provided by environment and hardware requirements].
I'm throwing another 12GB of RAM (making 24GB total) into my system tomorrow when I install Windows 8. Together with my new SSD it'll help crunching through some large data sets so that I can hit 100% CPU utilization. It cost me $100 USD to do so in a country where we often pay double for electronics. Few "normal" people can utilize all of that during the normal course of using a PC. Memory pressure is an easy problem to solve.