That's the problem with desktop-like UI, it's created by lazy developers. They used and learnt RAD ten years ago and they don't want to bother to learn HTML and how the web works.
Lazy developers are something corporations and IT departments have to live with. The good ones leave and end up working for startups or go independent.
The great thing about an IDE like this is that it can be a foundation for RAD projects - it could let IT departments finally move those aging VB6 / Access applications to the web.
Or any kind of application thanks to the mess of standards that web developers have had to deal with. Atlas and Flex are an imperfect workaround for that problem.