That's more or less also what Google does with Chrome in order to force folks to use it and only it. I know that well because I have Chromium installed for this reason alone.
Its nothing like what Microsoft did with IE. There are a few features in Chrome which are mostly optional for the vast majority of web apps. And some of those features like WebUSB make things possible in web apps that wouldn't be possible otherwise. So the "problem" is that Chrome is moving too fast.
IE had the opposite problem. Microsoft was moving too slow and was genuinely holding the web back. And obviously, that was intentional because Microsoft's business model at that time was entirely tied to locking users into Windows.
Its never been easier to write cross browser web apps. Some companies choose not to because they don't care enough to test in other browsers. And even then, there are a lot of apps that just happen to work in all the major browsers by chance. It wasn't nearly as easy to build a cross browser app for the IE6 dominated web.
