Just to be clear....
This is the section from the 2012 WT LIB
“This Generation” of Christ’s Prophecies. When Bible prophecy speaks of “this generation,” it is necessary to consider the context to determine what generation is meant. Jesus Christ, when denouncing the Jewish religious leaders, concluded by saying: “Truly I say to you, All these things will come upon this generation.” History recounts that about 37 years later (in 70 C.E.) that contemporary generation personally experienced the destruction of Jerusalem, as foretold.—Mt 23:36.
Later that same day, Jesus again used practically the same words, saying: “Truly I say to you that this generation will by no means pass away until all these things occur.” (Mt 24:34) In this instance, Jesus was answering a question regarding the desolation of Jerusalem and its temple as well as regarding the sign of his presence and of the conclusion of the system of things. Before his reference to “this generation,” however, he had focused his remarks specifically on his “coming on the clouds of heaven with power and great glory” and the nearness of the Kingdom of God. Immediately afterward, he continued with references to his “presence.” (Mt 24:30, 37, 39; Lu 21:27, 31) Jesus was using the word “generation” with reference to humans whose lives would in some way be associated with the foretold events.—Mt 24.
The people of this 20th-century generation living since 1914 have experienced these many terrifying events concurrently and in concentrated measure—international wars, great earthquakes, terrible pestilences, widespread famine, persecution of Christians, and other conditions that Jesus outlined in Matthew chapter 24, Mark chapter 13, and Luke chapter 21.
This is the section from the WOL:
“This Generation” of Christ’s Prophecies. When Bible prophecy speaks of “this generation,” it is necessary to consider the context to determine what generation is meant. Jesus Christ, when denouncing the Jewish religious leaders, concluded by saying: “Truly I say to you, All these things will come upon this generation.” History recounts that about 37 years later (in 70 C.E.) that contemporary generation personally experienced the destruction of Jerusalem, as foretold.—Mt 23:36.
Later that same day, Jesus again used practically the same words, saying: “Truly I say to you that this generation will by no means pass away until all these things occur.” (Mt 24:34) In this instance, Jesus was answering a question regarding the desolation of Jerusalem and its temple as well as regarding the sign of his presence and of the conclusion of the system of things. So his comment about “this generation” logically had an application down to 70 C.E. However, he was also using the word “generation” with reference to humans whose lives would in some way be associated with the foretold events during his presence.—Mt 24.
I think it is interesting they have not mentioned the current understanding and removed the justification for application in the modern day. They have honed that down to one sentence containing the ambiguous phase "whose lives would in some way".
This very easily could be a step in the direction of dropping the generation teaching or, pushing it to something so abstract so as to be meaningless.
Time will tell...