@Henene, I just don't see it as a viable option. It doesn't offer any energy efficiency, like a heatpump would; nor does it offer capacity. Many apartment dwellers have limited access to 240V connection; all have hot and cold in the kitchen and the bathroom though, so unfortunately the cold-fill-only is purely insignificant to an average American. Moreover, majority of US cities have provisions in place to ensure the landlord covers the cost of hot water - it's therefore more economical to use a machine that maximizes the savings based on that, rather than boost the ever-increasing utility bills.
There may be an insignificant number of people who will choose it in lieu of creating space in a place where a traditional laundry setup had been in place already, and I guess Whirlpool is counting on people's inability to process simple physics; or maybe it's the idea of a Smart machine that's flashy enough. I personally can't process a water-cooled condenser dryer that's packed with modern electronics - all they're doing is smoke and mirrors of technology with old technology.
There's a number of machines that can do what this one does, with no extra surprises like electrical connection or the cost of heating water, if one's tap hot is 'free'.
Another thing, Americans are used to dryers so much they don't believe in ironing - laundry most often emerges smooth and ready to wear. Items like dress shirts are either sent to the cleaners or ironed once in a while - also complaining about the task. A 1.4 cu.ft. dryer cannot ensure a smooth finish of a load larger than, say, 5 pounds. That's a lot of less-than-half-full loads to be done, and the efficiency completely disappears.