Microsoft's (NASDAQ:MSFT) annual Build developer conference kicks off tomorrow in San Francisco, and in this segment from Tuesday's Tech Teardown, Motley Fool tech and telecom bureau chief Evan Niu takes a look ahead to what investors can expect from the conference this year. Investors can expect a lot of announcements related to both Windows 8.1 and Windows Phone 8.1. Microsoft is also expected to reveal some high-level information about Windows 9, which is expected to launch next year.

Last summer, erstwhile CEO Steve Ballmer announced a major reorganizational initiative, One Microsoft, hoping to unify all of the company's moving parts. Evan says that he'll be watching closely for how much progress the company has made toward this goal. He will also have his eye on some possible technical convergence for the company's various operating systems, such as Windows 8.1 and Windows Phone 8.1, as well as a Microsoft personal assistant to compete with Apple's (NASDAQ:AAPL) Siri, and some possible details on the next major version of Windows.

The biggest thing to come out of Silicon Valley in years
If you thought the iPod, the iPhone, and the iPad were amazing, just wait until you see this. One hundred of Apple's top engineers are busy building one in a secret lab. And an ABI Research report predicts 485 million of them could be sold over the next decade. But you can invest in it right now... for just a fraction of the price of AAPL stock. Click here to get the full story in this eye-opening new report.

Erin Kennedy has no position in any stocks mentioned. Evan Niu, CFA has no position in any stocks mentioned. The Motley Fool owns shares of Microsoft. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.