Umm. New dual-core CPUs may use much less power than N900's 600Mhz single core CPU. Just like curent Intel Core i5 quad core CPUs using far less power than older single core Pentium4 CPUs.

Have you guys even read nVidia's claim of it able to play over 16 hours of HD video on a single battery charge? (I'm assuming they are talking about tablets with bigger batteries most likely but still very impressive)