Traditional console makers have often sworn up and down that mobile doesn't make money for game development. That might still be true for some developers, but you'll get a very different answer if you ask Epic Games. Co-founders Tim Sweeney and Mark Rein have collectively described the currently iOS-only, Chair-developed Infinity Blade as the "most profitable game we've ever made" when considering the amount of money and time invested relative to the money coming back. Yes, that includes even the Gears of War series, which most consider Epic's primary cash cow. Sweeney, like his long-time competitor Johh Carmack at id Software, is also taken aback by the power stuffed inside the latest generation of mobile devices -- a 2012 iPad is nearer the performance of a PlayStation 3 or Xbox 360, he tells Gamasutra, and the pace is only picking up. Even more insights await in the interview with Sweeney; click below if you want a hint of what one of gaming's pioneers has to say about where your tablets, phones and (yes) PCs are going.