The new firmware updates also resolve issues with the integrated volume button; improve the Type and Touch cover typing experiences on soft surfaces and/or when devices and keyboards are lying flat; fix issues with "random muting" and make unspecified Trackpad performance improvements.
The Surface Pro firmware updates include fixes to Wi-Fi reliability allowing for better roaming and improvements to "limited" connectivity scenarios; the enablement of Windows To Go feature; and improved onscreen keyboard detection synchronization when going in and out of sleep, according to Microsoft.
Microsoft has made a few Surface RT firmware updates over the past few months since the product was made available in October 2012. The Surface Pro went on sale in February 2013.
With Surface RTs, automatic updating is always on. With the Pros, Windows turns on automatic update during setup unless users decide to turn it off. (If you do so, you won't be notified when firmware updates are available.) Even if automatic updating is turned on, users can opt to proactively grab the firmware updates before they receive notification of their availability using Windows Update on their devices via these steps.
Microsoft officials previously told me that users of non-Surface Windows RT devices also can and should get updates (firmware and otherwise). A spokesperson told me a couple months ago: "OEMs can (and are) providing any needed firmware or driver updates using Windows Update. These updates are targeted to specific Windows RT models. Recommended OS updates are available to all Windows RT devices at the time they are published. End-user settings will determine whether they are installed automatically."