Yeah pretty much. You won't ever have to re-buy windows. If someone says you do, they cray cray. You have the product key embedded into the BIOS of your computer (no more unreadable sticker or peeling sticker anymore on the bottom of the laptop, but at the same time, no more stealing the Key and using it for another computer if the laptop dies). Now ultimately, if you can find a clean ISO, on the internet, that will work as well. Since a clean ISO is pretty much just an image of the Retail Disc, and since you technically "own" a copy of Windows (again technically for limited use on said device only). Then its in a legal grey area where you really aren't pirating windows but at the same time, you're downloading an image of the retail disc.