As a Windows Phone user I think this is a terrible idea. Didn't BlackBerry already try this? Did it help them? I don't think so. It is a slippery slope that only leads to irrelevance.

The beauty of Windows Phone is that it is not like Android and iOS. Well written WP apps, which follow the Metro (I know they don't call it that anymore) design philosophy integrate beautifully into the environment. Slapping Android apps, which follow very different conventions would diminish the user experience.

I don't think this is the case. I installed Fedora Core 4 Test 2 and it came with the GNU free version of Java. Open Office comes installed with it and works great without ever having downloaded the Sun JVM.