I think there's room in the market for both types of SUV.
Early SUV's were built on pickup truck chassis. Consumers were smitten the 'rugged' styling and machismo image, even though most of the SUVs sold never leave the pavement. Auto makers loved SUVs too because they only cost slightly more to build than a pickup, but consumers would pay much, much more for an SUV than what trucks sold for back then.
Eventually consumers grew tired of the terrible mileage and poor road manners of traditional SUVs (especially in the wake of several rollover debacles), so the market has been evolving toward SUVs that offer more of what consumers actually need (better mileage, better ride quality, less likely to roll over) with less off road capability, all the while piling on more and more upscale interiors and features to keep the profit margins high.
For a few years crossovers were popular, but consumers have began to equate crossover with the dreaded minivan, so manufacturers have responded by dropping, 'tall wagons' and 'crossovers' from their lineup and have further refined (softened) their SUV offerings.
Bottom line, yesterdays crossover is today's SUV and for most consumers that's a good thing. For those SUV buyers who actually need to go off roading or tow heavy loads there may be fewer truck-like SUV choices in the future.