Motorola POS concept design from 2007

Great post on Fastcompany Design on the Motorola sparrow concept

“With touch-screen smartphones, all of this specialized design has been dematerialized. Phones offered a tabula rasa platform to not just be an MPOS, but to do anything. They inherently solved the problems of portability. Their wider install base–iOS and Android–created a larger market, which lured a third-party development community to make specialized software (and if needed, hardware). Just look at Square or PayPal.”

Wouldn’t this have been great?

Why don’t we see more use of smartphones as pos terminals? Where is the card-accepting add-on?