zentara wrote:

I observe that people "expect more functionality" from a desktop app

The more a web app looks like a desktop app, the more the untrained user expects it to behave like one.
Often customers ask me: why is xyz not possible in this web application? and when I tell them it's maybe possible but hard work to make it work, they would say something like "but windows can already do it" and I start to explain the differences for the x-th time...