In this paper we discuss the advantages that digital processors have, compared to traditional analog spectrometers, and present some of the opportunities these offer for next generation portable instruments. We begin with a comparison of the topologies of analog and digital instruments and then show how digital processors' ability to operate on pulse specific information is applied to two example cases: ballistic deficit correction in large Ge detectors and particle identification in CsI(Tl) scintillators. Finally, we examine the power budget of existing XIA instruments and show an easy path to lower power portable devices in the future.