Microsoft releases new Windows 10 preview with Cortana, revamped Start menu, and Xbox app
Although Microsoft originally said it would release its new Windows 10 preview next week, the company has launched it today. The January build, as the company is calling this version …
Context & Ripple Effects
By January 2015 Microsoft's Windows 10 preview program had mostly been about plumbing; this build shifts the pitch to consumer-facing features, putting Cortana on the PC and shipping a rebuilt Start menu and Xbox app. It sets up the spring sprint that followed — the Mail and Calendar preview build and the developer onboarding push ahead of launch.
The reason this January build matters long-term is what its three headliners did next: the Start menu kept getting redesigned as a headline feature a decade later, and Cortana became a cross-surface play rather than a phone assistant.
First-order effects
- Windows Insiders get their first hands-on with desktop Cortana, the revamped Start menu, and the Xbox app immediately — and since the build landed days early, Microsoft shortened its own announced testing window.
Second-order effects
- Putting the assistant and the Xbox app inside the OS pulls Microsoft's gaming and voice services onto every Windows 10 machine, turning the preview channel into the distribution mechanism for services beyond the desktop.
- Cortana's arrival on the PC set up its spread across Microsoft hardware — it later reached the console itself when Cortana arrived on Xbox One for preview members.
Third-order effects
- The Start-menu-as-storyline proved durable: seven years on, Windows 11 previews were still leading with Start redesigns, including the customizable Start menu in the 2022 build after the first Windows 11 Insider preview, confirming the preview channel as the permanent home of OS feature iteration.
- If the pattern holds, operating system releases dissolve into a rolling service shaped by public testing — with bundled assistants and apps, not shell chrome, becoming the differentiator between platforms.
The trend: Operating systems are converging with services through continuous public preview channels, where assistants and bundled apps — not release milestones — carry the platform strategy.