While we're unlikely to see new Windows Phones being launched by Sony anytime soon, an early Sony Ericsson prototype handset running Microsoft's mobile OS is now available to purchase on eBay.
Sony Xperia Z3 and official Magnetic Dock review
Review of CastleStorm: Definitive Edition for Xbox One
Windows 10 desktop
Windows Phone generic
While its rivals vie for superiority in the smartphone space with ever more powerful quad-core processors, Sony says that we shouldn't expect such devices from them until 2013 at the earliest.
Sony today announced the latest range of Xperia NXT series handsets earlier today at the MWC conference in Barcelona. The new additions to the series are the Xperia P and the Xperia U.