Would that be the SAME interface on all platforms? But that's not great! Apps that aren't made with the OS's design language wouldn't look as nice
I have no idea. I'm just guessing at what could have been meant. :wink:
Up until very recently there was no unified design language for Android, and what Google has come up with now does look very similar to what WP has had since day one. I think that could be manageable without anyone realising that the Android app was derived from WP. I don't know how well that would work on iOS, but considering iOS doesn't have a lot of guidelines that relate to navigation/interaction either, that seems manageable to me too. I'd have to study this a lot more though to be sure. It's just a hunch.
Anyway, as long as such a technology uses each OSes own UI library to do the actual UI rendering (similar to Java's SWT), I think MS could realize something that offers a great experience on each platform, despite each app being derived/translated from a WP code base. If such apps use their own rendering library, so that UI elements on Android and iOS look identical to WP, then I agree that such an approach is very likely to fail (similar to how Java's Swing has pretty much failed for look&feel and performance reasons).