As usual, I think it just another brainstormed widget vendors hope to make a little money on. If you miss the drawer thingy and stuff falls to the floor, they have those little ports your baseboards that you can sweep stuff into to be sucked away by your central vac. Yet, heaven forefend, that would actually mean touching a broom.
Although I'm all for the idea of central vacuum systems, I wonder as to what kind of powerhouse system you'd have to put in to support the use of doo-dads like that. I think one video I viewed had at least two drawer vacs in different spots in one kitchen.
Of course, if I had the money to foot the bill for stuff like that I'd probably have somene in two or three days a week instead. I'd happily tell whomever, "Go do this . . . go do that," from my easychair.