I feel i am not yet convinced.
Apps are abundant and have alternatives from Android. Most, but not all. Games are a dissapoinment.
Battery life seems to be another issue. 2000mAh is quite low and not convinced it will last a full day with "moderate or normal use".
Music player still immature. Sound quality i'm not toatally convinced. Video player lacks some file support.
I did have some problems playing videos before amber update, but after it (it fixed many bugs), I didn't have any problem, and I watch videos all day long..
I keep my phone using 3g all day long and using whatsapp, twitter and wpcentral, it lasts around 12hours like this, if you use wifi, it lasts a bit more..
sound quality I'm loving it, the headphones that comes with the 920 is great and also have a nice and clear quality, you won't hear disturbs or anything and the isolating from the ambient is awesome, you don't hear anything with your headphones on your ears.. without headphones, it indeed could be a bit louder, but the quality still remains..
apps are definetly windows phone achilles knees, 6tag works just like instagram, there isn't snapchat client and twitter and facebook are in official form, but I understand you, there are many apps lacking, principally bank apps..
WP8 is still very new, not even 1 year, but microsoft seems to be changing it's relation with it, showing more interest and making updates/apps coming (this week A LOT of apps came to wp8) and now that microsoft bought nokia, I think great things are coming..
If the app question is a deal breaker for you, maybe it's not for you until it have, but if not, I really think you could give it a try..
try to get a lumia 520 just to get wp8 experience, if you like it, sell and buy yourself a 920