> Windows RT had one other anti-consumer and anti-developer feature: it was locked down like a Chromebook, so you could only use Store apps on it.

That was at least in part due to the aforementioned obsession with iPad and generally mobile. One thing that Sinofsky is not wrong about in his post is that the classic Win32 app model is not conductive to good battery life - there's very little there to properly handle things like automatic background suspension or low-power push notifications. WinRT was designed with that in mind, but that would make no difference if the apps would just ignore it, hence the heavy-handed push for WinRT apps only (AFAIR it wasn't restricted to Store, although you had to jump through some "developer mode" hoops to deploy apps directly).