but I believe it's still doable
A complete demonstration would be in order.
The question is whether it's doable remotely and if yes, what would be the price of such attack.
The pickup antennas could be hidden in any place where people are likely to use a Trezor: a hotel desk, a conference room table, the boss's desk at work, a PoS terminal... (Unless the antennas need liquid nitrogen cooling or something of the sort.)
There must be already several hardware wallets out there with 100 k$ worth of bitcoins in it; and the number is likely to increase as those devices become more popular. The hackers need to catch only one rich and overconfident victim for their investment to pay off. Alas, many hardware wallet owners do not seem to be aware of the remaining risks (and the makers obviously will not go out of their way to point them out).