A user over at the WPC forums claims to have had a Lumia 928 for a while now, and was nice enough to share some images and videos, and WOW! The results of the High Fidelity recording are mind-blowing! The sound reproduction is astounding! (put on a pair of headphones and check out the videos below, and lets not forget the magic of OIS which makes a concert video actually watchable rather than the usual jittery mess most people end up with!
Check out more videos and images at the forum post