Microsoft accidentally leaked information to a public website about its new upgrade to the Windows Phone software. While the Windows Phone OS 8.1 has only been available to users via wireless carriers, the company is already finalizing Update 1. While this release may have been unintentional, it is creating increased buzz for Windows devices across all carriers.

As a result, Microsoft has begun ramping up its marketing. Update 1’s headline features include the addition of Start screen folders that will let users organize apps by holding and dragging to a desired folder, much like their iOS and Android equivalents. Other upgrades include the ability to support interactive smart cases, which allow users to perform tasks even while the case is closed.

Other new features include enhanced integration between the Windows digital assistant, Cortana, and in-car navigation systems. In a newly released ad, Cortana performs a variety of context-aware functions, such as telling the user when he needs to leave to beat traffic, that Apple’s Siri is unable to follow or duplicate. Microsoft also added support for Voice over LTE (VoLTE) to Windows Phone’s existing VoIP support.

Windows Phone 8.1 Update 1 also paves the way for larger 7-inch devices, further blurring lines between a large phones and small tablets. This has created speculation that Microsoft is positioning itself to allow new tablets to run Windows 8.1 or Windows Phone 8.1 Update 1. This is consistent with a recent company announcement that every Windows OS would be converging to a common core. Currently the update is limited to 1920×1080-pixel screens.  Microsoft plans added support for several other resolutions, such as 800×1280 and 960×540.

Time will tell if Update 1 is effective. Microsoft, which is currently in the process of integrating Nokia’s device business, continues to run behind in the smartphone market. Windows Phones accounted for just 2.7% of shipments in the first quarter of 2014, placing them a distant third. Second-place iOS had 15.2% of shipments, but is poised to grow thanks to new phablets and a partnership with IBM. Android still dominates, with a staggering 81.1% of shipments.