Am I really that old?
Something that was stated, but not directly, is what's driven a lot of the latest additions to the browser: Cross-platform development.
The operating system provided the abstractions around various hardware implementations in the past, which meant being able to (possibly) run your software, if re-compiled, on different hardware platforms (it reality, some OSes weren't available except on a single platform and others were frequently not straight forward to get compiling on different platforms).
The browser is providing abstractions to the same hardware around various OS implementations. Add in WebAssembly, and you can pick from a number of languages -- including those that were traditionally used to write apps not designed to run in browsers.
But to the quote: I was cleaning out my basement, which quickly became a "treasure hunt" of sorts since I've been storing things that I took from my parents' house when I moved out.
My favorite find was a CD-ROM that was basically a CD-based Search Engine of the Internet. It was "Designed for Windows 95" and was probably a free disc given to me by a vendor rep when I worked at CompUSA in my teens. I'm tempted to see how many of these actual sites still exist (I'm sure none of the deep links do). Incredibly, these things probably sold very well back then. It even came with a browser (neither Mosaic nor Netscape; no clue who's it is).