Changes are afoot at Sony: new CEO, new PS Vita on the market, and a new opportunity to demonstrate the company can deliver on its "four-screen" strategy of convergence. Until now, that strategy has been a vague ambition to sell users a Sony TV, phone, tablet and PC. Now, though, with the PS Vita finally reaching US buyers, part of Sony's overall gameplan is starting to become clear. Vita OS is the "thin edge of the wedge" on gaming hardware, Yoshio Matsumoto, director of business at SCE, confirmed last week. Meanwhile, Sony Ericsson is no more, and Sony has sole control of the rudder: the company promised nothing but smartphones for 2012, but that doesn't mean Sony won't sacrifice Android in favor of a platform - and an ecosystem - that it alone controls.