It's not that they aren't a suitable product for consoles - in fact all of the big name isometric RPGs recently have come out for console. It's that they aren't suitable for the majority of console owners, who are, on the whole (as Archangel said in some other thread recently), "simpler" people who prefer to blast away in some corridor shooter rather than play any game that requires reading, numbers, thought, planning, strategy, etc. If you want to sell amazing numbers of units, you have to appeal to those "simpler" folks, and the sort of RPGs that tend to be isometric (other than Diablo type fare) just don't. So it will always be a niche genre, but there is still plenty of opportunity for people to make money making them as long as their sales expectations (and therefore development budget) are set correctly.
