I'm not in a position to comment over much on this product and you are welcome to disagree a lot with me.
I'm not sure what this is, at a guess an Android tablet a few years old (being Android 13). It is going to need a replacement for the HVAC controller, so some hardware. If being done well, a decent power control, instant start/stop command. The satnav and music will be existing apps. A GPS antenna might be needed (to improve reception), This suggests a USB hub, to accept the GPS, a music interface, the HVAC interface and supply some extra USB ports. The hardware for the whole lot is what $500 for the tablet, allow another $100 for the remaining hardware and then something for the bespoke software. None of this seems over difficult. Then there is the surround.
I have looked at prices for a Rasberry Pi (Linux) and at allow $100 for the Pi and $100 for a big touch 14" display (though not the resolution of a decent tablet, at 1,920x1,200), that comes with the USB hub (and ethernet RJ45) and an excellent development environment. The Pi is also very good at controlling devices with readily available controller cards. Will need the GPS antenna and to handle the music, (though that is available on a 3.5mm socket too in the above). Being much smaller, the HVAC controls remain unaltered and it wouldn't be too difficult to use the existing double DIN space. Wifi is a given (as it is for the tablet).
I'm not over convinced.
Of course, there is a world of difference between me speculating a bit and somebody who is prepared to go out there and make one.