@hardwarewallet: I think you are over a bit here. I have read your blog post explaining Meltdown and Spectre for the average person. Nice summary. I wonder how you can say, router OS or hardware wallets are secure. I cannot see how you derive this.
youre kinda missing the point.
at least on the trezor,
it only runs its own code in its firmware. it never executes foreign code, so there is no way to get something to run on it to exploit something.
now if the firmware gets compromised then it could steal stuff via exploits, but at that point the compromised code can do anything it wants anyway, it hardly need to use an exploit.
meltdown and spectre need to get code on the device to run to exploit them.