I emailed them and the head of the project said that the app itself can pass verification in the store since they updated their 8 million lines of code to run on W8, but they still have to transfer the audio/video APIs from the old style to the new one otherwise it won't work. Also WP is coming after the W8 version since the APIs are different. I would assume that whenever the whole "77% of shared APIs" thing comes into play, it'll come to WP.
Edit: also, apparently Google blocked them from the play store, so to the "average consumer", you could show them that WP has an app that they don't.