..Until April 8th. It normally costs around $800, so get it even if you don’t have immediate plans to use it.
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.