Beatnik is a UK developer whose Plain Sight, was a gorgeous robotic combat title on Steam. Samurai Beatdown is a little less refined, mixing rhythm action and hitting people with sticks. In it, you hack and slash your way with deadly rhythmic accuracy through levels in what will be a constantly updated and expanding Musical Brawler!
The game is coming to Vita and compatible Android devices via PlayStation Mobile. With all the musical and singing action coming the Vita's way, how long before Andrew Lloyd Webber has a game out for it? There's a little more info and imagery on the Beatnik Blog.
More PSM games here.