> Is this all just because of all the web devs seeing the increasing usage of smartphones and proclaiming that html is the better way, because they are too lazy even to investigate what native really offers?

Another possibility is: browsers are advanced enough to allow web apps to be possible, and as such, options other than native apps become available. Products requirements vary, and so do the devices you deploy to. There are a myriad other reasons one may weight the options and decide to develop a web app other than being lazy.

> I don't see similar push for desktop apps

I dunno. I use a number of web apps on a regular basis, Rdio being the closest thing to a native app I've used (I run it via Fluid to remove some cognitive gaps). Also, what about Chromebooks? Google's been aggressively pushing that. I think it just may be that more apps get developed for mobile, period, and as such the degree of interest in mobile web apps seems higher (which is ironic given how much easier it is to develop smooth web-based UX for desktop).