Hi,
I'm a big user of gallery because of the coherence plugin for gallery, that lets me easily display my photos on the TV set, or share it with other computers. However this feature isn't available for gallery 3.
Please support DLNA on Gallery3 without using 3rd party programs, since DLNA is up and coming standard that is available on almost every new device, especially TVs. Most TVs support picasa, facebook photos, and flickr out of the box so those services have an edge.
However if Gallery comes with it's own UPnP/DLNA server, then I believe it would be the go to app for hosting a gallery people looking for a stand alone gallery.
Sunil