For my company, this is exactly what's happening. Like Facebook, we found HTML5 to be insufficient for our app, so our resources have shifted to iOS and Android development. Native gives much better and consistent performance and UX, and the idea of write once-run anywhere on the web is still a pipedream. Cross-browser compatibility is still terrible.
The problem with HTML5 is it was designed by committee for displaying documents not dynamic apps. While JS has come a long way to closing the gap with native performance, it's the other HLML5 tech that's holding the web back. CSS is ill-suited to be hardware acceleration and DOM is a performance sucking hack that kills the UX on mobile platforms.
The problem with HTML5 is it was designed by committee for displaying documents not dynamic apps. While JS has come a long way to closing the gap with native performance, it's the other HLML5 tech that's holding the web back. CSS is ill-suited to be hardware acceleration and DOM is a performance sucking hack that kills the UX on mobile platforms.