If we got lucky the last time and evasion7 could jailbreak iOS 7.1 beta 3 , that doesn’t mean Apple is sleeping when it comes to jailbreaking their iOS. According to iH8sn0w the newly released iOS 7.1 beta 4 patches the kernel exploit used by the evasi0n jailbreak. However, and iOS 7.1 jailbreak is not out of the question since we don’t know what alternatives the evad3rs team can come up with. Besides, most probably the evasi0n7 tool was updated with iOS 7.1 beta 3 support and released to the public only because an unknown author has released a ‘cooked’ version of the tool to support the beta.
There are still a couple of beta releases to go before Apple releases iOS 7.1 to the public so be patient and don’t forget the golden rule: stay away from that firmware update button.