Ah! the 1980’s. A time when hair was big and so were the arcades. Sure, it's 2012 now, and we have more computing power in our iPads than we used to have in our houses, but there's still many a retro gamer just itching to play the classic arcade games on a classic arcade gear. Both the Atari Arcade Duo-powered joystick for iPad and ION Audio's iCade for iPad promise just that -- to give you a flashback of the '80s on the iPad of the '10s. But which is better, and which gives the best real arcade experience?