Having web pages as native apps goes back to Web Widgets on Series 60 phones, followed by WebOS.
On the Series 60, almost everyone favoured native Symbian and J2ME apps to web widgets.
WebOS sadly failed to gain major traction.
Windows Phone and Android devices can be obtained by fairly low prices and have the advantage of native apps, Webviews besides the browser. On Windows Phone the WinRT is exposed to packaged web apps.
So although I respect their efforts, I never really understood the effort, given that they were under the same OEM constraints as Android and the reviews of the available devices weren't that great.