The reason those TVs no longer qualify is because Energy Star made its requirements more strict this time around compared to the earlier version, designated 4.2, which has been in effect since April 30, 2010. According to Energy Star:
Televisions that meet the new ENERGY STAR Version 5.3 requirements are on average more than 40 percent more energy efficient than conventional models. Larger sets must meet even more stringent levels to qualify as ENERGY STAR. A 60-inch TV will be on average 60 percent more efficient than a conventional model.
In addition to increasing the stringency of the requirements for all screen sizes, the new version incorporates a "hard cap" of 108 watts regardless of screen size. That cap effectively disqualifies most plasma TVs larger than 50 inches, and many other large-screen DLP and non-LED LCD-based sets.… Read more