No. Microsoft will stick with Marketplace.
So why are they making this such a big deal?
Because no one knows of their "MarketPlace". Why can't they promote M-P to the level (or beyond) AppStore for Apple?
I'll tell you why again, because they want to be able to say "Buy that app in our App Store MarketPlace" Or something cheesy along those lines. If they were smart they'd come up with better promotion.
Buy XYZ exclusively in the MarketPlace only on Windows Mobile. Idk I'm not getting paid to come up with catch phrases for them.
Oh and I meant Android Market for Android Lol.