MS can't really use the browser to force adoption of Windows the way they wanted to before.
Ironically, they brought it on themselves with a combination of such a bad and non-standard implementation that many corporate sites were, and continue to be, tied to a broken version of IE, and a painful upgrade path by tying the browser to the OS. If IE was treated more as an application rather than a component, and multiple versions of it could be on the same install without hacks or issues, corporations would be able to ease into an upgrade path, of both the browser and the OS.
Ironically, they brought it on themselves with a combination of such a bad and non-standard implementation that many corporate sites were, and continue to be, tied to a broken version of IE, and a painful upgrade path by tying the browser to the OS. If IE was treated more as an application rather than a component, and multiple versions of it could be on the same install without hacks or issues, corporations would be able to ease into an upgrade path, of both the browser and the OS.