~10% general computing improvement is great, but I wasn't impressed by the progress made with Intel's new GT2 graphics architecture.
An incremental improvement to HD 4000 doesn't replace mid-range mobile graphics cards at all.
Considering that GT3 will only be available mostly in the quad-core configuration, this means mid-range laptops will still require power hungry graphics cards to run games reasonably.
This was clearly not a very well functioning sample system. It's no surprise that the GPU results look unimpressive if memory bandwidth drops by 20%. But also you can't expect miracles -- HD4600 appears to only have a 25% increase in the silicon budget over HD4000.
(I am a bit bummed that the earlier rumors of GT3 being mobile only appear to really be true.)
An incremental improvement to HD 4000 doesn't replace mid-range mobile graphics cards at all.
Considering that GT3 will only be available mostly in the quad-core configuration, this means mid-range laptops will still require power hungry graphics cards to run games reasonably.