The company clearly wants to highlight that this is a developer's event first and foremost. Of course, the consumer goodies will land tomorrow, but today Microsoft is getting technical.
Nadella confirmed that Windows 10 is now powering over half a billion active devices around the world. This is the first official update on Windows 10 adoption since last year. However, it is still some way short of Microsoft's goal of putting the OS in one billion active devices.
Microsoft has recently said the platform is now being used by 300 million users for at least 3.5 hours per day. This, of course, shows that users are buying Windows 10 and using it.
Also during his keynote, Satya Nadella said that the company's three core products (Windows, Azure, and Office) are now giving more than one billion opportunities to developers. This allows dev's to create solutions that reach Microsoft customers.
Office, Azure and AI will play a big part at Build 2017.
More Activations Coming
As for Windows 10, Microsoft knows there is still a lot of room for growth. Windows 7 is still the most widely used Windows build in enterprise, while Windows XP is still common.
With that in mind, Microsoft will clearly believe many of those business customers will eventually upgrade to Windows 10.