It was more of a UI comparison. With Movie maker live they basically DUMB'ed the UI down.... apparently they thought the old movie maker was to complicated.
I know they removed most of the features from the new movie maker, but what if they had given all the features of the old but with the new UI? It would still suck balls because of the removal of the old timeline.
I know what you are saying. How can Adobe Photoshop or 3ds Max (many many many many more programs like these) POSSIBLY become a metro application? Can you imagine all the issues with it?
I do not see metro applications become a serious thing.