If this is like "OS X", then it doesn't mean anything. You'll still have to pay to buy "Windows 10.1" or "Windows 10 Redstone" or whatever they will call it. "

If this is like "OS X", then it doesn't mean anything. You'll still have to pay to buy "Windows 10.1" or "Windows 10 Redstone" or whatever they will call it. "Last version of Windows" is nothing but marketing, just like the overhyped "one Windows" idea. There isn't actually just "one" Windows 10, is there? Most versions of Windows 10 are not even within 10% of each other in terms of differences. There's a much larger gap between them. Windows 10 IoT Core isn't actually Windows 10, just like Brillo isn't actually Android.