iOS 8.1 debuted on October 20, iOS 8.1.1 followed on 17 November. iOS 8.1.2 was not as expected, but Apple prefers to correct these bugs in this way. Note that loopholes to jailbreak may have been blocked, we do not have the answer yet.
Early 2015, Apple iOS 8.2 will offer, notably with the support of the Apple Watch. A beta is available to developers right now.