Sony\'s latest attempt to lift a slice of the handheld pie so ably scoffed by Nintendo is the PS Vita: a chunky black slab of portable PlayStation.It\'s a substantial revamp of the company\'s handheld legacy that started with the PSP and has evolved, until now, through five largely identical models since its 2004 debut. Each step saw minor revisions - three of which, the PSP-1000, 2000 and 3000, were basically size revising updates - and attempts to chase a rapidly changing market.The PSP Go added a sliding-case design further shrinking the device, and ditched Sony\'s original proprietary UMD disk format in favor of download only software. Even now the original device is lives on with the latest PSP, the E1000, undergoing a budget focused strip down with a cheaper build and removing all but the most basic features to squeeze the last out of it as a piece of (almost) throw away fun.