TheRojakPlace :
The first that comes to mind is how much it looked like PCMCIA cards, when it's said to be inserted into laptops. History repeats! ??
No, these cards are more likely to contain the laptop's CPU, memory, and primary storage. The laptop would likely be just a shell containing battery, display, keyboard, trackpad, and maybe some additional storage.
I don't really see this catching on as a way to have upgradable laptops, since these CPUs will be slower than most current laptop specs and the slot will just add bulk and cost. There would probably be other purposes for slotting these into a laptop or tablet shell, but those remain to be seen.
I highly doubt they're going to revive anything like a PCMCIA (AKA PC Card) slot, for these. Laptops are already too thin to accommodate it.