Here you can find something more on SecureElement(SE) and HardwareWallet (HW) : hackernoon
As for what comes after these improvements, two things I am really looking forward to in the future of hardware wallets are:
- Bypassing any general purpose MCU or ARM chip, the Secure Element controls and communicates with all the I/O, which would close the biggest attack surface on a hardware wallet. This is realizing “trust minimization” of the Secure Element.
- Fully open source Secure Element, which would bring to a whole new level of “trust minimization”. Happy to see Google is working on that.
( Disclaimer : The Author is the Founder at Cobo Vault )
Here is the thing:
Google Pixel 3 and above have eSE chips and they are opensource.
they use OpenTitan and HERE you can find the github repo.
There is also the very own experience of Alexander Bakker that is really worth a read!