Makes me laugh when i hear the Buy Arm or Sony talk, Apple wont buy ANY major company, Apple will buy some one that allows them to better develop Apple products in the future, or allow the to make them cheaper, they will look for some emerging tech or a supplier that allows them to move onto the next step of the ladder, all Buying Arm or Sony does is give them a load of expensive staff and boat load of crap they don't want or need.
as a business man i find it very interesting at how Apple is run, if you look at how apple have modelled there business its very clever, Apple is still very small in staff and physical size, they have created strategic agreements to allow them to manufacture there products in massive volumes with out having the overheads that come with it, if it all went wrong and sales dropped (as they did before) apple just reduce production and thats it, its people like Foxcon, and Samsung who make there products and components who have made the biggest increased to enable Apples products to be made, yes they have had a finical interest in helping these companies expand but they are not tied to dealing with all the staff and factories.