Popular Photography & Imaging's Executive Technology Editor Michael J. McNamara has written a very interesting piece musing about "Generation XLR," the next generation of digital SLR cameras. Among the innovations he predicts you can expect are multiple sensors (like the E-volt E330), dual lenses (like the Kodak V570), high-def displays, composite bodies (lighter than current models), gigabytes of built-in memory, and more.
