That's why I made the comment about TV networks (NBC), MS sunk a lot of cash into MSNBC. Also they put billions into AT&T's media ventures. Then there was Skype for $8.5B. They have themselves to blame for their cash position.
http://en.wikipedia.org/wiki/List_of_mergers_and_acquisitions_by_Microsoft
History is littered with companies that tend to fall apart after the founders are gone. Particularly "creative" companies like Apple. I don't see Apple being some kind of exception to the rule. Nothing they do is new or even particularly innovative. As has been rather aptly described by others, Steve Jobs' real talent was in taking the same raw materials and putting them together in a better way than the competition.
There was nothing new about the iPhone, it just did a lot of things other phones had already been doing, better. The iPad was just an iPhone with a 10" screen and ditching the cellular stuff, but there were loads of Windows based tablets before that. The iTouch is just the iPhone without the cellular stuff. Not one of the products offered anything new or unique, it simply performed the better tasks better than anything else at the time.
Now Steve Jobs is gone, and people with that kind of talent are a rare breed. There are then several other factors to add to that. The larger screen on the iPhone 5 is the single biggest change to the iPhone since the first one came out. iOS is largely unchanged since the beginning, and Apple lives in its own narcissistic little universe. Meanwhile the competition hasn't been sitting still, they've been taking notes and stepping up their game. Consumers are fickle, and if Apple keeps standing still, while the competition goes racing past...
Which is why I say the increased legal aggressiveness, more than anything, shows that Apple is basically tapped out. If they were the creative and innovative company they try and paint themselves, they'd be perpetually 3-5 years ahead of the competition. It wouldn't matter how much the competition copied them, because they'd always be trying to reverse engineer what Apple has already done. By the time a company like Samsung could manage to get their supply chain set up to make an exact clone of the iPhone, and get it onto the market, Apple would probably be about ready to release the next generation of its device. So then by the time Samsung could copy THAT, Apple would again be moving on. The fact that they are trying to club the likes of Samsung over the head with these ridiculous patent suits just says they have nothing in the pipeline, they know it, so they're trying to hobble the competition as much as possible, any way they can, to buy time.