Given that Microsoft is displaying the first signs of 'crumbling empire syndrome' - it sounds like a sensible move.
The 'genuine authentication' process ALONE is enough to warrant complete abandonment of the Window platform - the last thing you'd need in battle is to have to 'call up Microsoft' to keep your copy of Windows from shutting you down.
Don't think anyone wants to drive a 'Vista Battle Tank'!
Imagine the split second accuracy of a take down been fubar'd by the little blue spinning wheel of death popping up and proceeding to do nothing for the next 30 seconds...
... and imagine what a spinning beach ball would do instead?