The change means that, as of right now, the Surface Pro 7 Plus, Surface Laptop 4, Surface Pro 8, Surface Laptop Studio, Surface Go 3, Surface Pro X Wi-Fi, Surface Laptop SE, Surface Laptop Go 2, Surface Laptop 5, Surface Pro 9, Surface Studio 2 Plus, Surface Go 4, Surface Laptop Go 3, and Surface Laptop Studio 2 will all get at least six years of updates, per Microsoft’s support page. (You can see a chart with Microsoft’s end of service dates for all of its currently supported Surface devices there.)
Microsoft’s move isn’t quite as generous as Google’s recent decision to give Chromebooks released in 2021 or later 10 years of automatic updates. Still, I’m in support of any ways that tech companies can extend the life of their products, so I’m happy Microsoft made this change.