Why do you have to turn things on? The tablet uses hardly anything on standby and will last a couple of weeks without charge.
And I suppose that putting the key in the ignition will turn the tablet on? Resume my journey if all I've done is stop for a refuel? Continue playing my last media source, whilst also remembering how far into that audiobook I was in the CD changer should I feel the need to swap sources? I can control it through my wheel controls? I can get the vital display info (track name, street name, next junction information, etc) on my "in clock" screen? Why does the standby time have anything to do with it?
You do not need internet for navigation solutions. The same way a normal car navigation system works.
So instead, you need a decent app that has local maps and routing data? There's another chunk of cash on top of the tablet then, add the fascia, the cabling, any other apps you need to make it even remotely usable in a car, and it's not looking so cheap anymore!
Android OS is much better than anything a car manufacturer would come up with.
Better for what? I don't need to be a twit whilst driving, or book someones face, or play a game, or browse the internet, watch a video, or spend hours fannying about with a touchscreen trying to find the music I want to listen to. I want quick, minimalistic controls that can be accessed from the wheel, or at worst, from buttons (physical ones) that I can
feel my way around without needing to look away from the road. Touchscreens are utter garbage for this. Even the voice control of android is nowhere near as good as the SDS system in the car.
The specifications of the tablet would also be far superior unless, car manufacturers have started using cutting edge mobile chips. RNS-E is also expensive.
Why does it need "cutting edge" mobile chips? My MMI system never gets any form of
lag.
Decent inbuilt wins over anything add-in, hands down.
Now, I'm not saying that add-in systems can't be "ok", but when the alternative was an already inbuilt system that had to be ripped out to fit a low-end (low rent) tablet, that looks half finished (as do 90% of all carputer or similar installs), and with a low quality, home-built appearance? Come on.