@winocm uploaded a video that shows iOS 7.1.1 untethered jailbreak. He demonstrated it with iPhone 4 running iOS 7.1.1 and confirms this is not based on a long vulnerability chain. This time they used a small kernel bug that goes from mobile to kernel and successfully jailbroken iOS 7.1.1. The hacker also mentioned that this hack will work on other iOS Devices like iPad mini, iPad and iPhone 5/5S/5C with little more done. Which means, it is still not available for other iOS devices but we can expect it in near future.
There is also no info about when @winocm will make it public or test the same on other devices. You may follow his twitter profile directly to get latest news and updates about iOS 7.1.1 jailbreak release. If you havent updated to latest iOS version and still running iOS 7.1.1 then you may see a jailbreak very soon.