It doesn't quite throw css/js/html out of the window (yet) but it does remove the historic limitation that browsers have had of that being the only thing that w

It doesn't quite throw css/js/html out of the window (yet) but it does remove the historic limitation that browsers have had of that being the only thing that worked in them. So, it gives people more choice and indeed the option to not bother at all with html+javascript+css. That stack has always been a bit limiting and dated as technologies. There's a reason why people feel the need to do native apps on mobile: it's a competitive space and those limitations are simply not acceptable there. Browser based applications have gotten away with being merely good enough (some would argue barely good enough) for the last 20 years mainly because the tradeoff of them working in any browser was worth some sacrifices with respect to UX, design, performance, etc. Now we are getting some more options.