Last few posts have been pretty much right on. I think the SUV market "bubble" of a few years back really distorted the market. Many manufactures seem to be desperately trying to maintain/get back to those sort of volumns by making their SUVs more passenger car like. Not sure how this working out for them, my sense is not well overall. But this is such the prevailing wisdom of auto market and press "experts", who never really understood SUVs to begin with, that they really don't have any other options. Car and Driver, Consumer Reports, etc. pounds every SUV that doesn't behave like a mini-van.
My hope is that at least a few old style type body on frame/truck like SUVs survive as lower volume niche vehicles. But it really appears touch and go.
Toyota made a decision to go upmarket (Range Roverish) with the LC for the North American market long ago, just when the SUV bubble was inflating. But that decision and the parallel decision to start the luxury brand Lexus without a high end SUV never really made sense. Correcting that decision by adding the LX to the Lexus model line, left the LC in North America a very tiny niche while at the same time probably canablizing some LX sales.
I really would like to see Toyota differentiate the LX and LC further. A diesel LC with a much simpler interior, at least rubber floormats, and "Trail" options like real tires, winches and lockers would pay homage to the LC tradition and name in the way the current model can't would be my preference. I don't hold out much hope of this happening as they really seem to be pushing the FJ and 4Runner trail for the "hardcore" niche and I doubt the NA market would support a 3rd such option from the same company. Maybe if the FJ just went away.
Since the name Land Cruiser has such market recognition I don't see the name disappearing. Whether it is attached to the same platform as the LX though remains to be seen. I do think that Toyota internally understands what the Land Cruiser name represents historically, so there is some hope it won't end up on some rebadged uni-body type platform.