The time for printed electronics has arrived! ... or not... or "it depends". In this presentation, we will compare, through a concrete case of a UHF RFID reader, the designs and achievements in so-called "standard" and printed electronics. We will discuss the issues at stake and the parameters to be taken into account. Finally, we will propose a methodology to decide if a printed electronics design is justified and, if so, the steps to follow to complete the project. We will try to quickly assess the energy costs and the possibilities of repairability and recyclability.