they are not popular any more. they was popular beethwen 1990-2004, then they markets are slowly shrinked to virtually zero.
mmorpg-s are somewhat still popular.
I think you are misunderstanding the question... I think we are talking about "RPGs" as encompassing all subgenres of RPGs here (Maybe even some hack'n'slashers or Action Adventures), instead of "RPGs" as in "Singleplayer RPG".
Besides, fantasy SINGLEPLAYER RPGs are still going strong, at least the ones of western tradition... Dragon Age, Skyrim, and the likes.
The JRPGs are still popular in Asia AFAIK, even though interest in the west has shrunken a bit since the 90's... still, we get a brand spanking new Final Fantasy shortly, as well as a pretty extensive remake of FF7 in Unreal Engine 4.
I'm still planning to work myself through all three parts of FF 13 as soon as I have constructed my console replacement PC, all of them came out in this decade AFAIK.
We lost some of the better JRPGs in the mid of last decade, looking at the last Breath of Fire on the PS2, that is understandable though. They tried to come up with something new, and blew it (at least IMO... having to replay a large portion of the game because you have to use the dragon powers at some point and run out of it, which is permanent is not a "feature"... its called pissing of your players).
I thouroughly enjoyed Chrono Cross, but it seems many didn't. Received only middiling ratings. Given I was mostly wowed by the spectacular graphics for its time, the good soundtrack and the sometimes genious environments created, and hardly remember much about the game itself, most probably I was to busy enjoying the environments to notice that the game wasn't that good. Still, that also explains why there was no Chrono Trigger sequel after that.
Seeing how Seiken Densetsu 2, Or Secret of Mana 2 for us westerners haven't even made it to the US in the 90's (instead we got Secret of Evermore which IMO was actually quite entertaining, if not quite the same as secret of mana), I guess that Secret of Mana 1 must have sold below expectations in the west in the 90's (which is odd given how revolutionary it was at the time, and how everybody was talking about it back then).
Still, while the big JRPG hits from the nineties are mostly dormant at the moment, there are a lot of smaller releases that often get translated and make it to the west thanks to the cheaper digital distribution (thanks steam).
Yes, they are no longer as popular as in the 90's... they are still fairly popular, even if you exclude the MMO's (which themselves seem to struggle more and more. Which has to do with the high cost involved, still I guess we see actually MORE singleplayer fantasy RPGs being released now than fantasy MMORPGs)