Will there ever be a Jailbreak for A5 or A6 devices running iOS 6.1.3 or 6.1.4?

Besides the plethora of fake links purporting to offer a jailbreak of iOS 6.1.3 or 6.1.4, there doesn't seem to be anything on the radar from Evasion or anyone else, either tethered or untethered on A5 and A6 powered devices. At the time iOS 6 was first Jailbroken, they claimed to have a number of exploits up their sleeve, even for future updates. Is it possible Apple has plugged all of these holes? If so, this is sad news - especially for people like me that installed the iOS 7 beta, only to downgrade back to 6.1.3 and lose my jailbreak from 6.1.2. (Doh!) Is there any hope, or all efforts turning to iOS 7 from here on?