There are at least a few million households with this configuration in North America, so they have plenty of potential market. I can think of a few more use cases, but this (which is also MY situation) is possibly the largest.
I'm going to play a bit of wait-and-see, but if this vehicle turns out to come to fruition and isn't plagued with reliability issues, I am strongly considering purchasing one. Right now, we have a newer minivan, two motorcycles, and I usually drive my car to work, which is older, and is often breaking down. I live in Upstate New York, so there are a couple dozen days each year where it's dry and warm enough at 6AM to ride my motorcycle to work.
So what am I left with? I don't want to deal with repairing an older vehicle, and I am happy with the utility of our minivan, and fun factor of our motorcycles, so I just want something with the lowest hassle and cost of ownership. This vehicle is pretty close to the cheapest new car that you can get, but will save me most of my $120/mo that I spend on gas. Plus, it has to be easy to park at that size.
I think that if they can pull off a good design, at a good price, and get all of the other things right (I know, a tall order), they will have a market at least large enough to keep that factory going.