Given recent single vs dual core discussion, some have argued that Windows scheduler would be doing mediocre job given that the responsiveness increases so much when going dual or more. I am not so certain this is the whole truth.
And given the discussion around how game performance will benefit from going dual or 64 bit it would also be interesting to see (Charles!) videos from DirectX guys and hear what are their thoughts on the current performance bottlenecks. Provided
you bought a new computer with good HW and put some latest games on it, would the framerate and good looks be limited by CPU, Display Adapter, DirectX design or by how games utilize DirectX and the HW?
As Doc Brown might say, here we go back to the future again.