And again, JRPG's just take too much money to make in order to be profitable.
It's hard enough to make an 8 hour game be profitable, how much harder do you think it is to make a 60 hour game?
Your general AAA game is a GIANT risk unless it's part of an already established franchise (and even then there's still risj). Making a AAA game means a giant investment, giant risk, and anywhere from little to no return to a decent return unless you're a runaway hit.
Because of Final Fantasy, every game must at least meet the game bar that game sets or else you will look absolutely inferior regardless of how good the game actually is.
If you don't have infinite time and money that just isn't easy to do and makes a big risk even bigger.
Until making HD games is cheaper (and that isn't going to happen any time soon at all), console JRPG's are going to continue to come around less and less.
Oh, and one thing I did forget to mention is that just like how the DS and PSP are immune to this, the Wii is too, though not in as big as way. A JRPG will get released on the Wii and still be compared to Final Fantasy, but people will also go easy on it because it is the Wii. So you can still make a console JRPG on the Wii for a reasonable budget and at least have a justification for not looking as good as FFXIII (but you still need to look as good as FFXII which isn't simple either).
