It's not like browsers will cease to exist though. If the proposed selling of Chrome leads to slower change in web specifications (i.e. 'fully featured' browser stuff) I don't think that's necessarily a bad thing.
Microsoft definitely doesn’t care about the web or even its PC operating system much.
So now, no one is pushing the web forward. But Apple, Google and Microsoft are still motivated to improve their own platforms. While I personally think the modern web is a cesspool and I am okay with that as a user, I doubt many on HN who care about the “open web” feel that way.
As a developer, I haven’t touched the clusterfuck of modern web development for over a decade.