It's still not an easy solution for the average person.  If I handed a trezor to a Regular Joe off the street (or gf, grandma, boss, non-tech colleague, etc.), the first thing he/she would ask is "How do I get bitcoins to and from that thing?". 30 seconds into the explanation what it is, how to even set one up, much less how to use it, and they would have tuned me out already and walked away.

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.