As someone who puts cockpits and avionics together for a living (L-39 cockpits to be exact) I was thinking about this very thing at work today as I was assembling and installing a new instrument panel and it struck me as quite funny how we call the new lcd displays a "glass cockpit" when in fact, there is no glass in them at all. Actualy the term would be more appropriate for the old "steam gauges" (where's the steam?) as most of them actualy have a glass face on them.