Microsoft Promises to Support Surface RT for 4+ Years
Microsoft will support the Surface RT only in the Mainstream support phase
Microsoft will support its Surface RT tablet with updates, including security patches, until April 2017, or nearly four-and-a-half years after its launch. The support lifecycle for the Surface with Windows RT tablet is less than half the usual 10 years Microsoft allots its software products - including Windows 8 - but is considerably longer than what Apple has given the first-generation iPad, which has already dropped off.
Microsoft will support the Surface RT only in the "Mainstream" support phase, presumably because it's considered a consumer product. The company typically supports consumer - grade software only during that five - year period; all business software, as well as some titles that are designed for consumers, such as Office Home and Student 2010, receive another five-year stretch, called "Extended" support, for a total of 10 years.