A lot of people have been waiting for a "stable" jailbreak and for a stable Cydia version before they decide to update to iOS 8.1. Perhaps they only want to make sure that things are running smoothly enough before taking the huge leap.
However, many believe that those who are 1OS 7.x jailbreak holdovers must stop holding out and just update.
iOS 8.1.1 is now in beta and it has been recently confirmed to have the ability to kill Pangu's iOS 8.x jailbreak. Even if users are not prioritizing the jailbreak right now, it is still a very good idea to just take the leap and upgrade to the iOS 8.1. This way, when this jailbreak does not go as planned or does not meet the user's needs, they can still opt to jailbreak on iOS 8.
Those who have already tried the iOS 8.1.1 jailbreak have vouched that it was mainly a bug fix tweak. It did not really bring any new major features to the table. That being said, it can be assumed that it will most likely not stay in beta for very long.
Once Apple finally releases iOS 8.1.1, which is actually expected any time now, it could end up closing the signing window for iOS 8.1. Those who have decided to hold out on the upgrade will then be forced to make the direct upgrade to iOS 8.1.1.
This is why many now believe that it is actually in their best interests if they just go ahead with the iOS 8.1 upgrade now, even if they are not looking for a jailbreak right now. Deciding to do so gives them the window that they can always jailbreak iOS 8.1 in the future when the need arises.
At present, nothing can help Apple users from calculating precisely when the company will decide to close the signing window for the iOS 8.1.1 jailbreak. However, surely, it will be a fast move for the company, maybe even only within a few hours. The company bears witness to the exploits of the iOS 8 jailbreak that could end up being risks to its users and will surely want to close up those holes as soon as possible.