probably not. The only difference is that it'd be build once display everywhere. Flash meant that everything looked the same regardless of browser or platform.
Its a lot better nowadays, but its not as easy as flash was.
The _key_ thing thats missing is the flash IDE/designer. There are no compelling editors/environments that allows both artists and coders to work in the same space.
Sure I can use Illustrator to make graphics, but there are no animation systems out there that allow me to animate well (I can render a unity app to HTML/JS but thats not quite the same)