But what’s the value for Microsoft? Is this WinJS effort going to encourage devs to port their web apps easily into native Win versions? I think that’s just not very likely, most devs will settle with just a web app (e.g. Trello), and very successful web apps will get native versions regardless (e.g. Evernote).
I can’t help but think that the effort would have been better spent developing a hassle-free PhoneGap-for-Metro kind of wrapper rather than a close-but-not-quite web-like native environment that developers still need to treat like a port and a separate platform.