The jailbreak for iOS 6 was one of the most difficult to come by for the hacking community. A tethered jailbreak for older devices hit shortly after Apple launched the OS, but an untethered jailbreak seemed like it was never going to happen. Of course, the evad3rs crew eventually made it happen with the evasi0n jailbreak tool. Not long after it came out, Apple already has iOS 6.1.3 in beta, which is set to fix at least one of the exploits used for the evasi0n jailbreak.
What does this mean for you, the jailbreaker? As long as you don't update to iOS 6.1.3 when it drops, no ill will come to your device. You will still be able to enjoy all the best apps in Cydia.
David Wang, one of creators of the evasi0n jailbreak, tested the beta of iOS 6.1.3 and, in a statement to Forbes, he confirmed that Apple successfully fixed at least one of the five exploits used to make evasi0n a success.
Of course, the jailbreak community, David Wang included, is not one to give up easily, and he is currently digging through iOS 6.1.3 looking for a possible exploit to keep jailbreaking it a reality. It is also likely that Apple will not release the final version of iOS 6.1.3 to users for at least another month, if the company sticks to its usual release schedule, so users will be blissfully able to jailbreak their devices for at least a little while longer.
Wang also claimed that there are bugs not used in the evasi0n jailbreak that he and his team were hoping to keep secret for the next jailbreak. If Apple were to fix those bugs, the team would be starting from scratch, which means we could be looking at another long wait for a jailbreak of future versions of iOS.