I think on 360 they are not already dead but they smell so.
Blue Dragon was great but didn't sell well and even ff13 had much lower sales than expected.
On playstation? the real great AAA jrpg's have some problems as there is only ff left and dragon quest was exclusived by Nintendo-only great new was ni no kuni,but it sold far more than expected in the west(though overall sales are imo disspointing)
low-mid budget rpgs are not dying-that's for sure.Almost any weak you can read something about a new jrpg and you may need 2 years to play and finish all jrpg's available on ps3.That's far away from dying.
Wii-xenoblade sales were dissapointing considering the great reviews and dragon quest mmo sales were dissapointing(sadly wii u dragon quest mmo still looks like a ps2 game with anti aliasing)on the other hand t an old dragon(warrior)quest is selling real good in japan on 3ds.
I think the golden times for jrpg's have passed ,but no reason to worry,as there is another xenoblade to come,another final fantasymaybe another ni no kuni or dark chronicle and if you want to revive jrpg's on a high level you just need a remake of the mother of all hypes:ff7.
this game would sell far more than 10 million copies(multiplatform)
edit:considering that even here in germany jrpg's are produced(rainbow moon) i think they are far away from dying.And Rainbow moon is very very jrpg-bitmap style,100hour+ gameplay.
the sales(though only sold on psn) were good and a vita version will be released this year.
I think if even german can make succesfull jrpg's than this genre is far from dying.
