WOW. I think he's trying to say it'd be nice to have the option for computer programmability and to be able to update the ESC's software... hence the phrase OPTIONAL USB. It goes without saying that the normal programming buttons will most likely still be there and still work just as well as they always have.
I've been waiting to see how this full-size brushless stacks up, and if it's as smooth as it's rumored to be, I will probably be using one in the 2mod buggy.