There's only so much information you can get with hardware though. No doubt the software in tracking fingerprints, and matching similar ones has become very sophisticated. However, I wouldn't be surprised if device fingerprints hasnt increased in diversity much.
On the other hand, maybe they're using a spectre/meltdown attack to get a MAC address or something. In that case, we're fucked.
Sounds interesting. Do you have a source, or further reading for any of this?