The Sekonic booth is proof positive that histograms are miracle workers. An interesting new product is a color meter capable of accurately measuring the color temperature of light sources.
Sekonic easily demonstrated how auto white balance fails pretty easily. With their new PRODIGI C-500 meter you can get readouts in degrees-Kelvin, or as color correction filter numbers. There is also a version that offers wireless triggering of flash (the C-500R). You can use it to evaluate the color temperature consistency of your strobe units at different power levels.