I found it interesting that most of the demos provided work very poorly for "desktop web".

I think frameworks like this exist in a no-mans land - A modern web framework is great because it allows you to easily deploy one responsive app to a variety of devices/screen sizes/user inputs. This comes at the expense of performance compared to a native mobile app.

So if you are building a web framework that is built entirely with mobile in mind, then why choose the framework over native development? You are sacrificing platform agnosticism AND performance at the same time.