Well it depends on how you install everything. They cant steal what they don't know is there. If you keep the interior looking stock then you have no issue. That is like one of my #1 priorities with my install. From the b-pillar back will get blacked out tint only 5% light. The front nothing will be noticeable. I can say from most of the work logs every one is going a similar route. The iPad though is obvious no matter what. I also made sure the PC is literallt bolted into the car. They would have to take the rear center console out, which is attached to the cars framing. The Rear PC hatch is also bolted to the car from the bottom. This means you have to take out the spare tire from under the car then battle to get the nuts off. Remember people will steal things that look fast. In order for them to get anything out, they will have to steal the whole car and send it to a chop shop.
Now when I make these arguments, I am doing it for the sake of others because no way can I compare my install to any of this, I don't think you can either BugByte. I went the route of going super overkill, which has shot me into the thousands and you went with hardware that is premium and over priced. <Most people though build there setups on a low budget so they can get all the functionality of a uber expensive headunit. Basically they are having their cake and eating it too. I just think with a PC install you can get more for the money.