If it were only the dual sided nature of the cable and the ability to charge things with higher loads alone it would be enough to merit the switch to lightning, but it's even more than that. You can find hints to those reasons by the leaks from WWDC but there is much more to come from this connector, we are only at stage 1 of a cable that Apple has engineered to last the next ten years.
This post sums up the proper response:
Don't worry - even though the only benefits of Apple's Lightning connector over Micro USB are being able to insert it upside down and a hardware-enforced requirement to pay Apple a cut on any Lightning cables, there were plenty of fanbois in the media ready to portray it as some super-futureproof, all digital miracle. (In fact it's shown exactly the same futureproof, all-digital ability to support new interfaces without hardware changes as bog standard USB. Even the Lightning video out is a hack that compresses the video to the point it could be send over USB, and in fact probably is.)
Figuring out the correct orientation for a USB cable is a two second effort, so even the dual sidedness is hardly some digital miracle.