It could be the Pepsi sip test problem. Pepsi does well in sip testing, better than coke, but most people report liking coke better. Why? Pepsi is slightly sweeter, which means it tastes better for the first sip or two. But, in the long run, coke wins out because it's a bit less sweet and therefore more tolerable for a whole drink.

It's possible they tested touch screens with people using prototypes and whatnot but did not do their due diligence to test it long-term. On first impression, touch screens seem cool, futuristic, and flashy. It's really only when you try to daily drive the car that you realize they're annoying and a regression from physical buttons.

But, they present very well on sales room floors and car shows.