At this time, we do not have a date for when we will be updating Power Gallery, there are a few projects ahead of it such as Updating database functions to use MySQLi, updating Design Extender for responsive deigns and a few others.
we will certainly visiting Power Gallery, but we don't have a time frame for when that will happen.
Any suggestions you have, please post them to the suggestion page:
http://www.webassist.com/community/feedback/dashboard.php