So can this do desktop-like interfaces? We've got a plethora of frameworks now, but sadly none of the offers a good option for more "dense" apps. It's all good

So can this do desktop-like interfaces? We've got a plethora of frameworks now, but sadly none of the offers a good option for more "dense" apps. It's all good and well if I "just" want to do a highly interactive web page, up to a gmail level, but if I want a Swing/Cocoa/Windows-like experience, it's either ext or native...