Well, DLNA is doomed to fail because the standard is way too lose. Anyone that has tracked the progress of DLNA servers (e.g. Twonky and more recently, Serviio) knows how much work is involved in supporting the plethora devices in a meaningful way. Look at Serviio's custom profile collection just across the family of Sony Bravia TVs and you will see the problem.
If DLNA is to survive, they need to publish a 2.0 standard that is in-sync with features provided by newer AVRs and media players. For example, define video standards for 1080p video with multiple, embedded subtitles and audio tracks (2-channel stereo, SD surround and hi-def audio codecs as pass-thru - at least match what is provided by the DVD and BD specifications). Similarly, for music, allow for native playback of lossless audio (i.e. FLAC), which isn't even required by the current standard.
Without the above, server software vendors and CE device vendors are scrambling to find common ground and only the nerds, frankly, have the chops to make all of this stuff work in practice. In the meantime, Apple and Airplay will continue to completely dominiate this space and DLNA will remain a 'checkbox' feature - have to have it on the box, but few actually use it.
"Play the volume as loud as you want - but don't touch my levels now. I got them set just like I like them"