To any client wanting a Gallery, I have always recommended Xen Media Gallery because of the awesome support you provided. This is a very positive move for XF and excellent news indeed!
Does this mean we might see a Xen Pushover style functionality as default in XF 2.0? That would really seperate XF from the forum software crowd. The future is mobile and tablet.
And having a forum software which sends alerts/notifications to forum users on their phones/tablets/PCs will benefit new and existing customers by driving traffic to their forums. That alone would change the forum game and make stop gap solutions like tapatalk a thing of the past.