There have been recent changes in the licensing of the Windows Embedded products which bring them much closer to the licensing of “regular” Windows. One of the changes is the increase in SA benefits and if you have SA on a device running Windows 8.1 Industry Enterprise then you now get VDA rights, which means that you no longer need to purchase VDA licences for those devices to access a VDI desktop. There’s an interesting Microsoft article if you want to read more: http://bit.ly/1jgqWkW.