The implication that "a web OS" is what people want raises some question marks. I use the web a lot on my phone--for reading documents. I use applications for interacting with services because, still (and this is years after FirefoxOS), the experience of using a mobile web app, especially for integrating with hardware, is awful. There may be something of a chicken-and-the-egg problem here, but at the same time--if it's awful, it's awful, and so going towards real applications is the only thing that makes sense unless you want to make devices that are awful. Nobody wants to make devices that are awful.

Letting "the web optimize" your dialer, though, is perhaps the most dangerous idea I've heard in a while. Core applications under no circumstances should be optimized by the web because that's how you get malware masquerading as those core applications. No bueno.