RC:
My Jeep Grand Cherokee SRT has two digital displays, one 7'' in the dash called EVIC and one 8.4'' in the middle console called Uconnect. I think this is the best solution. A single display in the dashboard only is idiotic in my opinion but I guess customers will have to decide that. As a passenger, I would surely hate it not to be able to see what music plays or to switch music or to look up navigation information.
A single display is a terrible solution. First of all, information displayed on the dashboard should only be essential information for the driver that can be quickly glanced at for reference. Peering through the steering wheel is good for things like speed, RPMs, warning lights, temperatures, etc., and those things need to always be visible. It's not good for navigation, radio, etc. and it's particularly bad if these functions end up displacing traditional dash functions, which are required in large part for the safe operation of the vehicle. It also makes it impossible for a passenger to assist in managing the functions traditional to the "center console screen". There's an obvious reason why one set of information has been assigned to the dash and another set to the "center console screen". This is the result of years of evolution of this separation and distinction of functions that shouldn't be ignored for some unrelated reason.
This is an example of where the economies of scale, while many times a good thing, can turn out to have "evil" effect. The savings per car to drop this is minuscule in comparison to total vehicle cost, but when the accountants get involved to point out the total savings to the company by dropping something like this for all cars built, it suddenly seems like a good idea. This kind of thinking from automakers is exactly why the government so often has to get involved in mandating safety and other requirements for vehicles. Something auto manufacturers should consider the next time they want to complain about the same.