Get with it Minigun:
On Dreamliners, your 'Trolleydolly' is a 'Window Systems Operator' or WSO, as Dreamliner is fiited with the gouchie windows that fade dark and light electronically. At top-of-drop, the WSO hits an Armed Master Switch and all the cabin windows fade to very dark, almost black. This is pretty much all the WSO does throughout the mission, so not really a technological breakthrough more 'same old' I suppose.