Once enough overlapping time goes by they will likely change it back to the 2008 teaching.
"As a class, these anointed ones make up the modern-day "generation" of contemporaries that will not pass away "until all these things occur." This suggests that some who are Christ's anointed brothers will still be alive on earth when the foretold great tribulation begins."
Watchtower 2008 Feb 15 p.24
(copied from jwfacts ... http://www.jwfacts.com/watchtower/generation.php)