Actually, this might set the table for eventually moving the "generation" of Matthew 24:34 to a time yet future.
If the events of Matthew 24:29-51 are yet future, then why not the generation, which is included in those verses? Indeed, this would harken back to the "Sputnik" understanding that was documented by Raymond Franz, which was an interpretation espoused by three members (not including Franz) of the Governing Body while Franz was on the body.
I'm not saying they'll back-date it to Sputnik (1957), but that the basic premise is similar - the Sputnik idea came from the notion that Matthew 24:29-51. The concept of the "generation" verse being among those in a 'third part' of Matthew 24 (as well as Mark 13 and Luke 21) was what precipitated the Sputnik idea.
So I'm wondering if their understanding of the "generation" of Matthew 24:34 will be changed the generation, whether of the anointed or just of mankind in general, that will be alive and witness the future events postulated in this article.
Of course, with their new 'overlapping' generation understanding, they have already created an "out" to some extent. Hence they may not really need to update their "generation" understanding.