Actually what Apple (likely) uses to produce the results shown on the MacBookPro vid [html5 visualization] on their website isn't a picture at all. Most advertising, for product photographs that need to look absolutely crisp, are rendering a 3d model created of the object; not photographing the product itself. Modellers who do this within Autodesk Maya do this quite efficiently and using render engines such as Arnold or Renderman can produce results that are much better than any photograph can.
As the last answer noted, a little cleanup (like dust removal) goes along way.
But an alternative approach to what others have suggested is to do this, to really get it to look that way: shoot this in passes with a static tripod and vary the diffused spotlight's penumbra angle. Shoot these images RAW. E.G., utilizing a spot light (only), shoot from the left, right, behind and above - all at the same focal length and same camera position. Re-composite them once you clean up each channel individually. You'll see that the spotlight {front-right, for example] would have different light decay than rear-left, but mix the layers in adobe lightroom while adding that coloration on a particular layer will reproduce good detail under low light.
The other photographs you link to of products are rendered (I can tell from my experience), there wasn't a single real camera involved. The woman in the hoodie though was likely done with the aforementioned process. The product photos can be replicated (somewhat) using this process.
Skim through the RAW image article on wikipedia then do some experimentation within any software tool that can properly edit the layers of it and within an hour or two, you'll get the hang of how this type of image editing can produce near exactly the results you are looking for.
jasoncbraatz
san francisco, california