HTML/CSS/JS were not designed for big jobs. Show me an elegant, not-hacked, fast/responsive full fledged program running in WinRT and I'll believe they made the right decision.
I mean; proper Outlook with Gigs of emails, Visual Studio, Audio software, 3D CAD software... I think Game developers are already looking elsewhere... I wonder if any other companies are doing the same.
Keep Up with TechRepublic