I see merit in staying with an open source system. It means they can independently develop exactly what a specific vehicle requires without having to jump through hoops and restrictions that companies like Apple are notorious for (or applauded for). When it comes to the Land Cruiser...just think of how many systems end up using the central system. I NEVER use the navigation on my Cruiser...but I sure do use the screen for other important systems like AC, heat, and various other controls. If Toyota was able to adapt software for each vehicle without Apple's approval...they could release improvements not only to maps, but also to control of other vehicle systems. I use many Apple products mostly happily, BUT...in terms of technical CONTROL? Apple drives companies crazy, and I expect they would dive automakers crazy too.
Luckily, with two HUGE industry leaders shirking pressure from Apple and Google...Ford and Toyota make certain the system won't be just some nitch in the market.