Second thing they would say is, "I have to buy that thing for $120, when a credit card is basically free with my bank account? No thanks."
A trezor may work today for us Bitcoin geeks. But for Regular Joe mass adopters, trezor like devices need to be even easier to set up and use, as well as so ubiquitous that they are basically free devices, given away perhaps by bitcoin wallet services providers like Circle, BitPay, or CB.
Yes, instead of giving you a free $10 deposit with the opening of the account, give you a proprietary connected device, such as a trezor... so long as you maintain at least a certain balance of a certain quantity for a certain period of time.