Not at all. It simply indicates the system has a radically different interface than the web. And that web APIs have evolved incredibly more than system ones when it comes to building quality UX.

Its no wonder all the best native applications ALL use proprietary toolkits. Adobe being a prime example. Such a toolkit is orders of magnitude easier to reproduce in HTML/CSS than it is in any of Qt/GTK/wx and others.

Thinking a web app can easily be expressed as a systems application grossly overlooks the complexity web apps have scaled to.