From Gundam info:
From July of 1980 through March 2014, Bandai has sold over 434 million Gunpla kits. As part of the celebrations, a new HGUC 1/144 RX-78-2 Gundam, created using the latest in Gunpla engineering, will be released for the lineup's 35th anniversary in 2015.
The kit, the first revision in 14 years of the iconic 1/144 RX-78-2 Gundam, embodies the anniversary theme "Revive" with all-new molds. Ideal proportions, an evolution in mobility, and an easier build than ever combine to show new frontiers for Gunpla.