Windows 8 and the death of 'rich' apps - ZDNet (blog)

I have to disagree with this post. I've spent some time with the API and have to say that the amount of available controls, features and UI customization is really rich and expansive (look at the Build app to see some of the things).

There's a lot more to it than Windows Phone Mango, or the sample apps on the Developer Preview and I'm sure that, with a bit of learning, "rich apps" like Photoshop, MySQL WorkBench, Visual Studio,... could easily be recreated (better) using the Metro UI.