It's all downhill from here
Microsoft's profits can only go downhill in the years ahead.
It's latest profit depended almost entirely on consumers buying Windows 7. But consumers are going to move to more mobile devices. In a few years, the touch-screen phone will be the #1 client for accessing the net.
It's also very possible that tablet / slate devices will become very popular as personal computers for the average consumer. The smartphone / smartbook / slate market is out of Microsoft's reach. The company made catastrophic decisions 5 years ago that made it miss the bus in mobile.
Microsoft will not be able to get back into the consumer mobile game. You can't be 5 years too late and then come to market with a nice copy-cat product. Windows Mobile 7 is going to be another disaster, just like Zune.
Because Microsoft has ceded the next generation of computing to Apple and Google, its profits can only go downhill from here.