Could this be talking about an iPhone 12 style magsafe with a large pad? Not sure how that would work, you'd have to set your computer on top of it to have enough contact area. Couldn't go on the back of the screen (too thick), so I'm not sure where else it would be. And can it do a high enough wattage? A thin connection like the pencil charging along the side of the computer perhaps, but I'm even more skeptical of wattage with that approach, and it'd mean yet another special cable.
It's certainly true that Apple has been on a big magnets kick lately. MagSafe for iPhones, Pencil charging on the iPad, the Magic Keyboard mounting, and the Apple Watch charger all come to mind.