Having recently had the (dis)pleasure of getting a DS1054Z oscilloscope, I'd confidently say I'd prefer mouse/keyboard-controlled numbers on a multi-gigahertz processor PC, over a waveform-scrolling jog wheel which updates at 3 frames per second with unpredictable acceleration. Though given a processor that isn't slower than trying to run YouTube on a Pentium M, I'd probably prefer a physical knob or dial for continuous parameter control.