Google is the nutty professor with no business acumen living off the profits of one good idea - advertising. The quicker they get squeezed out, the quicker the grown-ups can get back to business. Not sure whether that is a good thing yet.
Amazon is the autistic economist brother of Microsoft; continually optimizing against the boundaries of acceptable capitalism. Not evil by any deliberate choice, just aligned permanently towards maximal returns. Take it or leave it.
Apple is a fashion company which every now and then revolutionizes the consumer tech world. Since consumers hate most of the other companies and don't have any collective negotiating power, Apple reaps a big reward, then goes back to tinkering with the aesthetics.