It'll Happen...
My feeling is that manufacturers are getting away with the monochromatic look for a time, but that more contrast will be seen in appliances again soon. Today's silk-screened control panels look cheap, even on expensive appliances. Sooner or later, a manufacturer will put a great-looking "retro" control panel on something, and it will sell well, and then other manufacturers will follow suit. It's all about fashion, really. There was no cost-cutting reason to change from silk-screened black control panels to white ones; it was just to get a new look into appliances, to make older ones look a little dated. Since manufacturers have done about everything they can with silk-screening, I predict we'll see a return to something more detailled, with some bright trim. Right now, white-on-white appliances look almost Soviet to me in their cheapness and austerity. Stainless fronts are a misguided attempt to brighten things up- they can be very high-maintenance, as anyone with a houseful of kids and a stainless reefer can tell you. Black is nearly as bad about showing every last finger mark.
It'll change, trust me.