Stratosphere - Competitive iPad Tower Defense
It may be the multiplayer component, it may be the minimalist look of the game... chances are it's the great pun for their title that got me interested. Using the larger play area of the iPad, players try to keep their opponent's armies at bay. As a TD game, it doesn't look like it does much new, but the local multiplayer aspect more than makes it worth a view of the trailer.
It releases this Thursday.