But that's not the only thing happening today. What else is going on?
MSDN and BizSpark get the RTM bits: Finally -- after asking Microsoft officials this question for months (not kidding), we have an answer. Windows 10 is available as of today, July 29, on MSDN and on BizSpark. Product keys are required unless users are doing volume-license activation, according to Microsoft.
New deployment tools are on their way: The Windows 10 Assessment and Deployment Kit (ADK) should is set for July 29 availability. The new Microsoft Deployment Toolkit (MDT) 2013 Update 1 release will be "in early August, as soon as the team finishes their testing with the final Windows 10 bits," Microsoft execs said. The next version of System Center Configuration Manager is due out in Q4 of this year, as Microsoft officials have said previously, and will provide full support for Windows 10 deployment, upgrade and management. System Center 2012 R2 Configuration Manager SP1 and SP2 already provide "full compatibility with existing features for Windows 10 deployment, upgrade and management," a spokesperson added.
Universal Office apps for Windows 10: As of July 29, the touch-friendly Office universal apps (Word Mobile, Excel Mobile, PowerPoint Mobile and OneNote Mobile) are all available for download from the Windows Store. These apps can be used on any and all Windows 10 PCs and tablets. Basic functionality (such as reading and sharing) for these apps is available free, but more advanced capabilities (document authoring, editing, etc.) requires an Office 365 subscription on any device with a screen size of greater than 10.1 inches, as is the case with the universal Office apps for iOS and Android.
"Security remains a critical component of our promise to our customers. In Windows 10, your computer is kept up to date with new innovations and security updates. Updates are installed automatically with some flexibility regarding the timing, with no need to select which updates are needed. For rare cases, Microsoft has provided a tool to delay an update as a temporary measure, but the tool is not intended for ongoing usage. For IT Administrators, Windows Update for Business provides flexibility for managing when and how updates are deployed."
Other Windows 10 variants: The version of Windows 10 rolling out starting today is for PCs and tablets. Coming later this year, we'll see Windows 10 Mobile for Windows Phones and new small Intel- and ARM-based tablets. We'll also see Surface Hub running a custom version of Windows 10 core some time later this year. Xbox One will get at least some subset of Windows 10 features starting this fall. A developer version of HoloLens, which also will run the Windows 10 core, will debut "within a year," according to the latest from CEO Satya Nadella, with a consumer-focused version to follow some time after that.