launching iOS 7.1 is scheduled for March of this year and surely many will rush to install the new version of the operating system, even if it does not bring as many news as you would expect. Even so, some will probably "accidentally" update to iOS 7.1 and they will not be able to return to an old version of the operating system, but many of those who have jailbreak they will initially avoid the update to keep their solution intact jailbreak.
Of course, this situation will not last forever and at some point some will want to give up jailbreak, even on their own initiative, without being obliged. In my case, the dramatic improvement in battery life or the release of the first beta version of iOS 8 would motivate me to give up the jailbreak, but there is a slim chance that any of these things will happen now. What would motivate you to willingly give up the jailbreak you have now?
