Starbucks using pay-by-name will be a breakthrough, assuming that's where the Square partnership is going. Since Starbucks is already asking for your name when you order coffee, it could turn into a great customer experience that would build broad momentum for pay-by-name.

Is this PayPal agreement just adding a new and more complicated option to the existing terminal base? Will retail clerks even know what it is, and will there be any reason for a consumer to migrate from credit card use?