Point of comparison.
We bought our Model S (2015) with AP1 (one camera, and later radar activated for driving, and ultrasonic systems, etc...) for 2500. After we bought, they later raised the price to 3000.
Now, AP2 comes with 8 cameras (and all the ultrasonics etc) for 5000.
So just in hardware, there is an 8 to 1 benefit for double the price.
For comparison:
Mercedes Benz (E-class) has a similar Driver Assistance system, bundled into their premium package options--you can only get them as an upgraded premium package. Base premium package (without any assistance packages) is 3700. To get equitable driver assistance, it is 10200.
So MB charges 6500 for their AP features.
BMW has a suite of Driver Assistance systems (5 series). To get something equitable to AP you have to get all three systems (They've actually simplified it a bit since last I checked).
The total for a comparable system is 4900.
I don't know the hardware details for the more current MB/BMW systems. But as we can all see, pricing is competitive with other competitors at this time.