I doubt it in this case. I think it would be shooting themselves in the foot. If that is the case, then I will be switching to Linux on my windows Box once windows 7 is no longer supported, or making it a hackintosh. I think what they mean though is that you only need to pay for the OS once on your machine. When you build a new box, or buy a new laptop a windows license will be paid for at that point. Beyond that, they keep it up to date for free until the machine is to old and slow. This is how apple does it now. You pay for the OS with the hardware, then free updates from there on out.
Wouldn't free Windows updates, to the latest version, for the lifetime of the machine be a much bigger headline that this 1 year free update period? Wouldn't they be singing it from the rooftops instead of hiding behind vague phrases?