Apple's got incredible amounts of money in the bank, as you probably already know. According to recent financial filings, Apple is about to spend a good bit of it. The company will reportedly spend US$8 billion during the next financial year, which is more than twice what it spend during the last 12 months. A full $900 million of that will go straight to its retail stores. Last year, the company (only?) spent $614 million on retail, so that's a nice improvement.
Other areas of spending are a little bit more about company infrastructure, presumably. Apple is moving forward on that brand new "mothership" campus