Didn't you get the memo?  HTML5 is a false messiah, with web-based applications losing relevance with each passing day - sure, lowest-common-denominator applications that bring mediocre user experiences to the masses, despite the browser compatibility issues that will always exist ('write-once, deploy everywhere' would, in reality, be massively detrimental to all of the largest technology vendors, dropping to near-zero the differentiation that native platforms make possible), will be confined to the entirely mundane aspects of our business, none worth working on, like consumer sites, for examle.  Windows 8,like iOS, is all about native applications, deployed and updated via app stores, not a whole bunch more crap delivered via the traditional web and resulting in (yawn) a yet another lame web experience trapped within IE10.  The present and future belong to occasionally-connected, cloud-enabled native applications.  Nothing to be gained investing in anything less...