A new rumor from ZDNet's Mary Jo Foley claims that Microsoft will release a preview version of "Threshold", the next version of Windows, sometime in early 2015 for ARM processors, and it will run on Windows Phone devices along with certain tablets like the Surface 2.
Foley, who based her article from unnamed sources, claims that the ARM version of Threshold will be made available sometime in January or February of 2015, a few months after the first preview build of the x86 version of the OS will reportedly be released by Microsoft. The ARM port will reportedly do away with the desktop UI entirely. The company is rumored to be holding a press event on September 30 to officially reveal the first details of Threshold, which may or may not be labeled as Windows 9 when it get its final release; that is expected to happen sometime in the spring of 2015.
Foley also says that after Threshold is made available this spring, Microsoft plans to update it monthly with new features alongside improvements and bug fixes, rather than wait six months or a year as has been the case with previous versions of Windows. This might mean Microsoft could, in theory, do away with launching a "Windows 10" down the road in favor of just updating Threshold.
Foley's information in the past has been very reliable but, as always, you should take these unconfirmed reports with a degree of skepticism. What do you think of Microsoft possibly doing away with big yearly updates in favor of monthly feature downloads for Windows?