You don't get access to the decryption code nor the keys - both are hardwired in silicon.

We'll eventually be able to reverse-engineer that and run it programmatically, but it will take a long time.

And when they catch you doing so, they'll ban your (personalized) encryption key so you'll just have to buy another graphics card to get another key.

This is how it already works, not some future thing. But the licensing fees make it so it only gets used for Hollywood-level movies.